I used to watch "Dr. Quinn". There was boxing in one episode but the rating was TV-G. No big deal because boxing violence isn't really violence. Well, it was in this case.I subscribe to DAZN, mainly for boxing. Every live event is preceded by three warnings: "strong language," "sporting violence" and "flashing lights." You wouldn't think that last one would be a concern in a boxing telecast, but it is, since every boxer now has an elaborate "ring walk" entrance routine featuring lights, smoke, pyro, etc.
The broadcast networks are quick to label anything TV-PG. There seems to be a lot of content on "Jeopardy" that should be TV-PG, but the rating is always TV-G.