I live in France.
It's not a constant topic of discussion here the way it is in the UK.
I think the official government position is that TWAW, but most French people have complete contempt for the government anyway, regardless of who is in power.
As far as I am aware there are no trans women in women's prisons in France, and there are fewer single sex spaces in public places anyway, for example, in municipal sports facilities the changing areas tend to be mixed sex with cubicles, so there are fewer places where it actually makes a difference. At our local pool it's all individual cubicles and there is one communal mixed sex shower area where no one takes their swimsuits off, plus a couple of individual shower cubicles. I suspect the whole public sports set-up is simply not inclusive of, e.g. Muslim women, but then France isn't very inclusive of those people to begin with.
I don't know any French people who believe TWAW.