The trawler "reportedly sank due to heavy winds, rough seas and overcrowding", the United Nations said.
Amber Mezbourian is working in Bangladesh for the UN as part of a Jersey funded role.
Myanmar says The Gambia has failed to provide enough evidence of genocide against the Muslim-minority people.
The Gambia accuses Myanmar's leadership of carrying out "brutal and vicious violations" against the Muslim minority group.
At least 21 people are now known to have died in the boat which was carrying undocumented migrants.
Hundreds of Rohingyas, who fled Myanmar in hopes of a better life in Malaysia, remain missing.
Rohingya refugees tell the BBC they were flown from Delhi and forced into the sea off the coast of Myanmar.
Min Aung Hlaing is accused of crimes against humanity in the alleged persecution of Rohingya people.
The BBC has spoken to survivors to piece together the attack on civilians earlier this month.
