First let me say that I don't care if anyone wants to use the male lesbian term or not. I have no skin in that game.
So, if you are a man, you can not be a lesbian.
If you are a man who thinks he is a woman, you can not be a lesbian
If you are a man who wants to be a woman, you can not be a lesbian
If you are a man living as a woman, fully integrated in your community, you can not be a lesbian.
Only a biological woman can be a lesbian.
Gender is irrelevant.
If men can't be lesbians and women can be lesbians then men can't be (or become) women. They can only pretend to be women.
Good luck trying to convince some of the members of that!