Lesbians use dildos and strap-ons all the time, they just have no desire for it when it’s attached to a man because they have no attraction to men. A lesbian who is not transphobic will not mind if they end up dating a trans lesbian who hasn’t or has no plans to have gender reassignment surgery (GRS).
My wife’s cousin is a gay trans guy who’s been married to his husband for a long time and he’s never had GRS. Why? Because his husband doesn’t fucking care what he has down there.
No one is forcing lesbians or gay men to be with people who have the “wrong” parts. If a lesbian has no interest in dating a trans lesbian because they have a penis then that’s fine, but once they go out of their way to spew hate and harass trans people then yeah that makes them transphobic