Actually it was changed in 1983, but not all women agree with it.
https://churchpop.com/2014/12/08/10-reasons-women-wearing-veils-church/
I am not Catholic, but the Bible actually says women should cover their heads.
Years ago, I read that reference in a letter of Paul to head coverings. It said something like, you should cover it, or you may as well cut it off. I guess it was distracting to the guys during liturgies.
I went, “oh, well”, because I wore my hair short anyway. That lasted the next couple of decades. Now it’s longer again, but I’m way too old and out of shape to distract guys from their prayers, so I’m not too fussed about it.
I was attending a Catholic university in 1983 and I don’t remember the subject of head covering ever coming up at the time, either from “campus ministry” or the “religious studies” department.