I can't rec you anything specific, but I would suggest checking basketball or soccer, because those are sports I have seen significant f/f content in. Maybe women's softball, but I don't think they have as much of a media presence as the WNBA or the women's soccer league, the name of which escapes me.

If you're looking for femslash sports content, I would check out real-world sports where there is a significant women's presence in the media, because, by and large, the RPF sports femslashers I know have been more likely to be drawn to that.

My info may also be behind the times! I am also significantly distanced from the friends who were deeply into f/f sports rpf, as they have also long since gone off to grad school and left my parts of the fandom world behind.