Alexus D'Marco from the Bahamas took part
Xulhaz Mannan hacked to death in 2016
Roundtable with advocacy groups took place in Hanoi
Effort part of strategy to address migration 'root causes'
Andrea González murdered days after vice president visited country
Activists have scheduled marches, galas, forums
Former U.N. ambassador a vocal LGBTQ rights champion
March 24 letter notes pandemic has exacerbated vulnerabilities
Mandate harmed HIV/AIDS service organizations
Former UN ambassador a vocal LGBTQ rights champion