The FCC's enforcement bureau is not very large or well resourced and is primarily concerned with issuing enforcement actions on licensed broadcasters. You can look at their public documents/listings of "Notes of Appparent Liability" for examples. Everyone who gets fined by the FCC is public recod.
https://www.google.com/search?client=firefox-b-d&q=FCC+enfor...
https://www.google.com/search?client=firefox-b-d&q=FCC+NAL+n...