Reza, an 18-year-old Afghan migrant, draws at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, poses for a picture at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, poses for a picture outside an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, poses for a picture outside an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, draws at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, takes a break at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, draws at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

Reza, an 18-year-old Afghan migrant, draws at an art studio in Belgrade, Serbia, November 21, 2020. Unlike throngs of migrants from the Middle East and Asia which since 2015 passed through the Balkans to reach Western Europe, Reza decided to stay in Serbia where he was granted asylum. Reza arrived to Serbia from Iran in 2017 as an unaccompanied minor and now he is studying to become an artist. Picture taken November 21, 2020. REUTERS/Marko Djurica

A child holds a piece of bread in her hand outside the new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 23, 2020. REUTERS/Yara Nardi

A man is seen through a barbed wire at a new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 22, 2020. REUTERS/Yara Nardi

A woman looks over the barbed wire of a chain-linked fence at a new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 21, 2020. REUTERS/Yara Nardi

An Afghan child plays next to the barbed wire outside the new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 20, 2020. REUTERS/Yara Nardi

The hand of man is seen behind a barbed wire at a new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 20, 2020. REUTERS/Yara Nardi

A man is seen from behind at a new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 19, 2020. REUTERS/Yara Nardi

A woman is seen from behind as she stands in front of a barbed wire at a new temporary camp for migrants and refugees, on the island of Lesbos, Greece, September 19, 2020. REUTERS/Yara Nardi

Unaccompanied refugee minors are seen on a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors wait to board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors walk to board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors walk to board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors leave an airport shuttle as they board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

An unaccompanied refugee minor boards a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors leave an airport shuttle as they board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

Unaccompanied refugee minors wait to board a plane to the mainland following a fire at the Moria camp for refugees and migrants on the island of Lesbos, Greece, September 9, 2020. REUTERS/Elias Marcou

An unaccompanied minor who was deported from the U.S. sits at the entrance of his room at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

An unaccompanied minor who was deported from the U.S. sits at the entrance of his room at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

Fray Carlos Caceres chats with an unaccompanied child who was deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

An unaccompanied minor who was deported from the U.S. sits at the entrance of his room at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

An unaccompanied child who was deported from the U.S. touches hands with his carer at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

A worker in protective suit talks to an unaccompanied minor who was deported from the U.S. at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

An unaccompanied minor who was deported from the U.S. is seen at his room at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

Fray Carlos Caceres and a worker serve food to unaccompanied minors who were deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

A carer (C) talks to an unaccompanied child who was deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

Fray Carlos Caceres and a worker serve food to an unaccompanied minor who was deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

A worker in protective suit talks to an unaccompanied minor who was deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

Fray Carlos Caceres gives a beverage to an unaccompanied child who was deported from the U.S., at a shelter in Guatemala City, Guatemala July 31, 2020. Picture taken July 31, 2020. REUTERS/Luis Echeverria

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, July 7, 2020. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, July 7, 2020. REUTERS/Alkis Konstantinidis

Deputy Migration Minister Giorgos Koumoutsakos greets unaccompanied refugee minors before they board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece July 7, 2020. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece July 7, 2020. REUTERS/Alkis Konstantinidis

A boy waves as unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece July 7, 2020. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece July 7, 2020. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to Portugal under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece July 7, 2020. REUTERS/Alkis Konstantinidis

A Salvadoran transgender woman washes her feet at a migrant encampment, where more than 2,000 people live in while seeking asylum in the U.S., during the outbreak of the coronavirus disease (COVID-19), in Matamoros, Mexico May 1, 2020. REUTERS/Daniel Becerril

Unaccompanied children from overcrowded migrant camps in Greece ride a bus after their arrival at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Unaccompanied children from overcrowded migrant camps in Greece gesture as they ride a bus after their arrival at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

Police is seen near buses carrying unaccompanied children from overcrowded migrant camps in Greece, after their arrvial at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Unaccompanied children from overcrowded migrant camps in Greece gesture as they ride a bus after their arrival at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Unaccompanied children from overcrowded migrant camps in Greece leave a plane after their arrival at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Unaccompanied children from overcrowded migrant camps in Greece leave a plane after their arrival at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

A child leaves the plane with unaccompanied children from overcrowded migrant camps in Greece at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

A bus is seen near the plane with unaccompanied children from overcrowded migrant camps in Greece lands, at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

A tent is set near a gangway, as the plane with unaccompanied children from overcrowded migrant camps in Greece lands, at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Plane with unaccompanied children from overcrowded migrant camps in Greece lands at the airport in Hanover, Germany April 18, 2020. REUTERS/Fabian Bimmer

Greek Prime Minister Kyriakos Mitsotakis wears a protective face mask as a precaution against the spread of coronavirus disease (COVID-19), as he arrives to attend the departure of unaccompanied children from overcrowded migrant camps who will be transferred to Germany, at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Greek Prime Minister Kyriakos Mitsotakis and deputy Migration Minister Giorgos Koumoutsakos wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19), as they arrive to attend the departure of unaccompanied children from overcrowded migrant camps who will be transferred to Germany, at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Greek Prime Minister Kyriakos Mitsotakis and German Ambassador to Greece Ernst Reichel wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19), while attending the departure of unaccompanied children from overcrowded migrant camps who will be transferred to Germany, at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Unaccompanied children from overcrowded migrant camps who will be transferred to Germany, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they board their flight at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Unaccompanied children from overcrowded migrant camps who will be transferred to Germany, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they board their flight at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Unaccompanied children from overcrowded migrant camps who will be transferred to Germany, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they arrive to board a plane at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas

Unaccompanied children from overcrowded migrant camps who will be transferred to Germany, wear protective face masks as a precaution against the spread of coronavirus disease (COVID-19) as they board their flight at the Athens International Airport, Greece, April 18, 2020. REUTERS/Costas Baltas