As Judy was put on cigarettes, amphetamines, and a chicken soup diet to keep her figure childlike for filming, forced to wear breast binders and so on, I think she might actually be quite opinionated about the transing of little girls.
“Garland herself had been asked if at a San Francisco press conference if she minded having such a large gay following, to which she responded: “I couldn’t care less. I sing to people!”
That’s not really a lot to base your assumption on. She may be very LGB friendly, but there’s no particular reason to suppose she’d welcome being played by a man.
She was a very clear victim of patriarchy.