I think it's available in the US on HBO Max.
Italian subtitled drama and probably the best thing I have seen on TV in the last 10 years. Up there with Breaking Bad, Chernobyl and the first two seasons of Narcos.
There are 4 seasons based around the Naples Mafia with the first one and (I think) some of the second based on undercover reporting by a guy who had to go into Police protection when the book first came out because he'd pizzed so many nefarious types of.
Maybe it has been discussed in here, but if it hasn't don't not watch it because it's subtitled, it's utterly brilliant.
There is nothing either good or bad, but thinking makes it so.