She has offered to bank roll the legal battles of a woman who openly advocates for trans genocide, and that’s only one of her most recent actions against the interests of trans people. You’re right that she has articulated her position well enough, but her position is absolutely not being supportive of trans people. I suggest you take a look at these videos if you want more info on the matter:
I know it hurts to come to terms with if you were a fan of her work, but JKR is unquestionably a terf.
It’s my emotional support mood indicator!