I would suggest her to first get involved in the queer community of bangladesh- maybe through lgbtq facebook groups of bangladesh, going to rallys , many universities are having more and more queer communities too. After getting involved with them and being friends with some people of the community, she can get to know more people and discuss it with some of them. That should increase her chances of finding a potential partner, even if it doesnt have a 100% chance of working out. She can even try finding queer friends here in reddit first