Basically a woman who tops a guy? Not as in a power bottom or whatever, she actually tops with toys or something. So far I haven't been able to find anything like that. No rape or anything pls

Oh, of course, I'd think your best bet (to start) would be in here...

https://www.mangaupdates.com/series.html?category=Pegging

the category tag for "pegging", if you haven't already looked at it.

And, depending on where you're looking (what site, here we don't have as much "gender-specific" tagging), looking for male:anal in combination with female: femdom is also a potential, along with (and no idea if this would work for you as well or not), futanari/shemale/dickgirl on male type stuff.