In the space of only a handful of years, maybe 3 or 4 and only a couple maybe that it really got into the press etc.
The words woman and girl have been redefined in England (my focus as where I live and know most about) by much of the media, by the political parties, by the NHS and a raft of charities.
The new definition (globally?) is 'any human who has an internal gender identity of woman/ girl'.
This was changed without consulting women or girls (globally?).
Some obvious issues.
A child is neither a boy nor a girl by definition until they are able to express a definite and firmly held internal gender ID.
Many people do not have a sense of an internal gender ID. They are therefore not women/ men/ boys /girls. For females, this means that anything looking at or discussing anything to do with girls/ women should not include them in any studies, and the results should not be applied to them. From educational achievement in different areas, to health needs, to services etc. We have seen this with girl guides who changed from sex to gender (and then said they had never ever been a single sex org...?!) and initially said they would have a conversation with non binary girls and advise them that other groups would suit them better. (I think they changed that after a fair bit of criticism).
Luckily, we have been given other names that we can use when we need to. They are very friendly terms and not dehumanising at all. Additionally, the fact that they focus on the very functions and parts of our body that are the reason we've been oppressed globally for as long as anyone knows is not an issue (for reasons).
Menstruator
Vagina haver
Ovulator
People with a cervix
Non men
People without a prostate
People who menstruate or expect to go through menopause
Etc etc
Men however rarely seem to be termed cis, I don't know if male dominated websites get posts about their cis privilege. They are not called people with a prostate, ejaculators, scrotum havers etc. Even on sites which do use the new language for female people.
I think we'll all agree this is fair though (for reasons).
So in short. I think we're very lucky! We've still got words to describe women and girls when it's needed. For example, headline. Systematic rape of Uighar people with a vagina in Chinese camps. That's nice and clear isn't it. Not jarring at all. (Not sure why orgs who use people with vaginas for reports on reproduction, didn't use it for that headline. They used women. A real head scratcher that. Must have been an editorial mistake).
So all in all. We have it good! I think all the terms I put upthread are quite long though and they boil down to one thing. It would be easier just to say something like gash? Hole? Cunt even. After all they're terms that plenty of men are already familiar with, and women too, of course.
It's all very progressive and I can't understand why there is pushback at all