There’s a thread on AMA from a trans man (18 year old) in which they explain they’re in a gay relationship with another trans man.
So both born female, both now identify as men, both are attracted to men so are gay. They don’t have a ‘genital preference’ however so when having sex it operates a lot in the mechanics like a traditional lesbian sexual experience, it sounds like.
It’s not just gender that is fluid now but definitions of sexual attraction etc. It’s confusing - anyone can be anything, identify as anything and have sex with anyone and call it what they like.
I honestly, hand in heart, do not think it is inconceivable that two trans girls in a relationship might have PIV sex and the natal girl might get pregnant as part of a ‘lesbian’ sex use encounter.
Not all trans teens are experiencing dysphoria to the extent that they wouldn’t consider ‘traditonal’ PIV sex but just call it something different.
There’s so much misinformation for teens about sexual anyway - can’t get pregnant if he pulls out etc - that it will be ignorance not malice that makes this become a scandal for girls, whether trans or natal.