Yes.
And that’s the biggest issue with using gender to differentiate leagues. It’s an issue the olympics sidestepped by using testosterone levels as a gauge instead of just allowing anyone to play in any division they want.
Esports doesn’t have a way of testing for fair play so any male pros could make a team, identify as a female, and most likely win the tournament. It would obviously be terrible for the scene and seriously harm their reputation, but their is nothing anyone can do to stop it.