The “Gender Critical” crowd has long been a large crowd of trolls who just love sealioning their way into communities and gaslighting people into doubting themselves.
I speak from experience; I’m a former moderator of /r/Genderqueer.
Best thing to do is to ignore their questions and deplatform them. They’re no better than your average transphobe who hides their phobia behind “just asking questions” and “peaceful debate”