"they want to chuck actual biological females under the bus"
While you are probably right, I really want to emphasise that there is no other way to be female but biologically, since 'female' and 'male' are biological descriptions.
I am probably boring everyone to tears with these frequent reminders but it is imperative that we stop dancing to the transactivist tune, talking/writing as if we agree with their "anyone who thinks they are female are female" party line. The term is female, not "biological female". They want to chuck females under the bus.
There is only one way to be female and that is biologically, since 'female' is a biological description that means of the sex that can bear young or produce eggs.
Feelings, gender, sexual attraction or lack thereof to whichever sex have no bearing whatsoever on whether someone is female or not.