I'm a GC feminist who has been involved in this movement for many, many years, plus a mumsnetter of the best part of 20 years.
Yes, @Holidayholiday2025 and @Olderbadger1 - like you, I've been involved as a feminist activist & researcher - in my case, since the late 1970s. I have a quite different perspective to those recently coming to the women's movement via posting on the internet as activism (eg FWR) or joining the opposition to gender extremist ideology in very specific campaigns (such as transwidows/children of trans).
But I look for silver linings - the gender extremist lobby (the TRAs) have certainly galvanised & revived a broader women's movement. In the 1990s, we were starting to get worried about the dominance of liberal/choice feminism; I can remember this being a discussion in a MA in Women's Studies I set up with colleagues (yes, when Women's Studies still existed!).
So it's been wonderful to observe the revival of a very active grass roots feminism that isn't about being a female "lad" or seeing being prostituted as emancipation. FiLIA is one organisation that, as @Olderbadger1 lists, casts a very wide net and is leading on some very important international projects. By focusing on FiLIA it doesn't mean that I'm negating or discarding other organisations - I do volunteer work with WDI, and am a member of my local WRN.
As I keep saying, when there's such a broad, grass roots movement (women are 51% of the population after all!) there are bound to be different aproaches and foundational beliefs. And that's OK.
We need to be less defensive and more comfortable about disagreeing with each other.