I wouldn't say I'm distrustful of them, but I know they won't be...sigh..."allies" to LGB people for the exact reason you mention. They have been trained to equate same sex attraction and trans as the 'same'. After all, it's LGBT isn't it?
The best we can do is just educate people on this shit. I made a Twat account when Elon started looming overhead just to push the buttons, and so far I've been temporarily suspended three times...all of them for raising awareness of LGB communities being separate of the TQ+ ones. I push back on the 'trans women of color started pride' bullshit, I point out that the ones creeping on kids are straight men masquerading as women and molesting little girls, and I point them to groups and links like LGBAlliance and the 'cotton ceiling' expose. I've gotten a few hits back, of people telling me they weren't aware we had a 'civil war' in the alphabet soup, but most people just shrug it aside...especially the zealot Christians with their "Homosexuality is a sin" spiel.

That's my biggest regret, that this insanity growing on the left has pushed me so far to the 'right' that I now find myself in conversations and threads with these types of people because our beliefs are more closely aligned than with neo-liberal ideology.