I suppose she might be saying that men and women are socialised differently, so some biological females might have a "masculine" set of behaviours etc that isn't caused by sex? But... that's a gender-critical view.
Exactly. Pushing back against socialisation, i.e. gender stereotyping, is what gender critical means.
And I wouldn't mind so much, if there was a single, solitary transwoman, to my knowledge, who displayed even the slightest nod to female socialisation.
It's not much of an argument claiming that a man's inner gender identity is female, when they only display the gender stereotypes of a man, all the damn time.
It's not biological, it's not innate and it's not even female socialisation. It's rampant, toxic male socialisation and male biology from start to finish.
This is what happens when someone's internal sexism is so instinctive, they can't see it, even when their arguments go up in a puff of smoke because of it.