I think it depends on the context, I don’t think women should say it unless they are in a space with other LGB people where the comfort level is high with all parties. The same for men saying the d word.

Also you can’t really reclaim a slur if you have never been called it, so someone self identifying with the f slur and never been called it makes me a bit uncomfortable.

Maybe I’m just over sensitive because I got it a lot at school so if I heard non GB men saying it that I didn’t know I’d feel a bit shit, I wouldn’t care if it was an LGB friend of mine.