Nostudel and Amethyst support it.
Basically go to your profile and scroll to the right after followers, following until you see Reports or click this direct link

https://poster.place/#/u/npub1uw6lgv5qyexx68fwgdmwt3w7v3dwv679sray2ncpkug70ad7a8gqut3tay/reports 

 I only see what I have reported, not who reports me... or does that mean no one has reported me ??? 

 maybe you have to login with your relays?
Try on nostrudel.ninja 

 I did it 👀 

 Oh, I checked your profile and I can see all the reports, it seems that no one has reported to me. 

 oh weird. You had to piss off someone 

 I have 2 reports 👀