Because of non affirming faiths, I think we're likely to see more ironic/non ironic LGBT/queer cults take root, if Gen Z choses to embrace some sort of spirituality. It's there in some corners already with tarot/astrology.
There is also the Metropolitan Community Church which was specifically created by and for LGBT Christians. I used to know a transwoman who was strongly affiliated with the church in Chicago, and she said that it was growing.
Yes. And of course a shout out to the Quakers. LGBT Christians unfortunately are more often than not having to forge their own spaces but that's been the case with oppressed groups in the Christian community throughout it's history.