Don’t know about the app but it seems Italians could watch the fishing channel on the web, at least for some time… I just saw a guy who kept talking about “bass fishing” in “Bassin’ road , bass or die”. But I think that ended. I could see for a few minutes a message:
「ただいまCM中です」which I think means “A commercial message is being shown now” [literally “now inside a commercial message”]
And now I can only see the blocker dog, so most likely the blocking isn’t done on the whole channel but selectively on some programs (probably they don’t have the rights to distribute it worldwide).
Maybe that explains why OP could watch it. No one cares about mahjong or shogi enough to restrict its distribution, but they sure care about anime and other stuff so some channels are (always?) blocked.