Badge on TV App

I had the same issue and I was able to remove it by removing the apple tv app from my dock and then adding it back. When I added it back it no longer had the badge. I hope this works for you.

Open the app and learn what the badge is about.

It very likely is related to the Apple TV+ introduction.

Restart the Mac.

I suggest using TV's Menu to go to TV > Preferences > Advanced and reset all the options shown there.

Not for me.

It worked but after I restart my Mac, the badge comes back. Uff...