Ah, those are not hidden. They are deleted, gone, bye bye. For any of those the imdb or tvdb ID will need to be added to TMDB.
it’s not just affecting your situation. There are shows that will never come back because of how tmdb does things and a mismatch with everything else. Honestly, I think there was a conflict of interest with the person they hired. He put out a new version of his own app, while all this is happening here.
This is a thread to try and get them to remove it.