Not just Roman Catholics but Eastern Catholics as well.
But really, only 2
sexes. Gender is in the language, incl. the pronouns, & there are 3 linguistic genders in English, masculine, feminine, & neuter; also in German & Latin. In Swedish there are 2, common (i.e. for male & female) & neuter. Other languages vary.
But calling sex “gender”, & “gender ideology” in general, were come up w/ by John Money, the same evil pervert who castrated David Reimer, forced him & his brother into sexual acts together, made pornography of them, drove them both to suicide, & demonstrated what the faithful already knew: it’s impossible to turn a boy into a girl.
I definitely will not call a man “she” or a woman “he” if that person tells me to. It’s a lie & false witness. Those are certainly sins.
It’s esp. insulting for a man to pretend to be a woman & expect us women to accept him as one, as if he makes a better woman, b/c he is more powerful than us. It’s oppressive. He makes a mockery of the Church (which is feminine); pads his hips to mock our childbearing ability; puts on false breasts to mock our child-nurturing ability; wears makeup & often a wig, to entice other men, luring them from chastity; & likely commandeers the name of a female saint.
I will call the person what God made him or her. People who can’t accept their own selves shouldn’t bully me into accepting their lies, & if facing reality has become debilitating, the person should be getting help w/ it.