@ember @DesasterTristan @anarchopunk_girl I’m definitely not just talking about expression. And the two can’t easily be separated, since for a lot of people their gender expression and the way they feel about it is both informed by their gender and a way through which they get to know their gender better. For example “long hair but in a masculine way” might be a gender expression thing, but it for some reason feels very tied to my gender for me, and if I didn’t have long hair but in a masculine way I would probably be dysphoric about it.
Also for a lot of trans people, the transfem/transmasc labels have always kind of been about expression because they describe the way they transition. There are many different ways people see and use these labels, and I guess it’s hard to pin it down to something more specific than “masculinity-femininity in a trans way”