My current understanding is this:
Sex is chromosomes, immutable, unchanged, majority binary with some exceptions (xxy etc).
Gender is expression and roles, which is just social construct stuff, how it's expected genders to look and act, tradition, doesn't really matter, can change as we see fit.
Your post has very much confused me, would you defining sex, gender, gender expression and gender identity for me?
I'm an ally but I need concrete definitions to make arguments against the anti-trans folks.
Conservatives listening to scientists when they could be making money instead? Don't make me laugh