Sex is the biological category, whereas gender is the culturally shaped expression of sexual difference: the masculine way in which men should behave and the feminine way in which women should behave.
So since it’s people talking about the biological male/femaleness they’re literally imposing cultural values on it right there, which I think qualifies as gendering.
The Oxford Dictionary says:
So since it’s people talking about the biological male/femaleness they’re literally imposing cultural values on it right there, which I think qualifies as gendering.
You’re not able to gender someone else though, if someone says they’re female, you can’t go ‘No, you’re male’
They can’t say anything though.