Do you know of any famous south asian poets/writers who were lgbt, preferably lesbians?
My first thought was Khush: South Asian Lesbian and Gay Association would be a great place to start looking at this. It was in Canada, so it explored a slightly different experience, but I think you could definitely find a lot of what you are looking for by researching them.
This is probably because I am Canadian, but a couple more activists within Canada to look at who is queer and work heavily within the South Asian community we have here is Alex Sangha and Farzana Doctor.
My last suggestion would probably be Shamim Sarif, who is a director who everyone should honestly check out.
I hope this helped if anyone else has any additions feel free to add them.