in a bid to distance themselves from trans women, it seems that some feminists are prepared to reinstate the notion that being a woman is something that can be defined and constrained biologically.
This is so manipulative. Jane Fae is deliberately conflating women's biology with the oppression women have experienced because of that biology, by saying 'defined and constrained', and by using the verb 'reinstate'. Notice what happens to the sentence if you take out 'and constrained' and replace 'reinstate', with 'assert'.
in a bid to distance themselves from trans women, it seems that some feminists are prepared to assert the notion that being a woman is something that can be defined biologically.
Because duh, yeah, it can.