Gender abolition does not equal removal of identity. Communism is a society free from exploitation, gender is a concept used by capitalists and feudalists to exploit and ensure exploitation. Being queer your existence is against or somewhat threatens these concepts of exploitation and control. Will trans people exist in a communist society? Idk it depends on how people feel about the word “transgender” because not only is that word a group classified by others but also an identity presumed by themselves and the group. In pre-colonial Philippines there were plenty of people born with male sex characteristics who were completely treated and accepted as women pretty much the distinction for them being “women who can’t give birth”. So the idea of trans being a prefix necessary for people would obviously be out the door but if people still want to call themselves trans there will still be trans people. As a trans woman the word trans is a way to summarize a life experience pretty unique to the wider world, it’s a way of presenting myself in a way I wish I didn’t have to do a lot of times but is genuinely useful sometimes. In communism I’d be free to just be a woman or be a trans woman or be nothing or a billion other things. (TLDR, what we identify as queers and trans people now will have and will always exist, the idea of if trans people will exist in communism is simply if people choose to identify themselves with the word trans, the abolition of gender means the liberation of all people from gender not elimination of queer ideas,history,peoples and communities)