xd

>What is and isn't gender now? Who the hell knows!

It's right there in what you quoted.

>with reference to social and cultural differences rather than biological ones
>a range of identities that do not correspond to established ideas of male and female

That is, an identity, based on the societal and cultural expectations of how you look, act, dress, talk, etc. based on that identity.

This definition is based entirely on stereotypes. That's kind of the point, no? If you identify as "woman" then what you really identify as is on some level the societal norm of what a woman should be as ingrained in you through life.

That's kind of the idea behind gender roles and norms as a whole, no? Society defines what a woman is based on its expectations of what a woman looks like, how they act, etc. If you're a male who identifies as a woman, then on some level that identity is based on what you think a woman is, as you've learned from what society depicts as the stereotypical woman. There are certain characteristics beyond just biology attributed based on that biology.

For that, you don't need a definition based in biology. When someone says to act "lady-like," they don't mean to be female- they mean a specific set of manners and appearances associated with society's idea of how a refined woman should act and appear.

Thus, the "literally anything else" category covers any identities that don't neatly fit into cultural expectations of male and female in a way beyond just the standard individualism that a typically male or female person might experience such as a girl liking something typically male or acting in a more typically male way.