In the 1970s, the then-new term "gender" meant a bundle of norms, stereotypes and expectations faced by women and men respectively and it was seen as something to subvert. Now, "gender" is used to mean an intangible inner essence that, in the social realm, can only be expressed in relation to stereotypes. Thus, stereotypes are not subverted but reified.
That's how you get
the sinister recent invention of "a trans child": if a girl doesn't like dolls and dresses that's how it is known she is really a boy.