It's so stupid because in the UK, last time I read up on this, it's not even legally possible for a woman to commit rape (based on the definition). So, police can only bring charges if they're charging a man ffs.
No one is ever forced to call anyone anything. As far as I'm aware, it can't be compelled. I do it when asked because I'm empathetic and not an a-hole but in a case like this, I would never call a rapist a woman, even if a judge tried to force me to.