I think you need to look at why trans got lumped in with LGB to start with.

It's not because most trans used to be gay, AGP has always been more common than HSTS in the West. Even most drag queens used to be straight men. It's not because same sex attraction has anything to do with changing gender, otherwise moves would have been made to get other gender non-conforming groups into the alphabet like nerds or tomboys.

It's because firstly, they are all groups defined by how they want to have sex which is why kink is now also completely entwined with Pride, queerness and gay rights activists. Secondly It's because rates of personality disorders are very high in all the alphabet groups but just trans. These are people who think in a minority way who can go into a crowd of mixed gay and trans people and find they are suddenly the norm. There are a whole lot of young gay people with NPD and BPD who are never going to kick out the trans and become a personality minority in their community. If course those damaged people will tear whatever community they are in apart, that's just what cluster Bs do.