I really don't want to keep interjecting. I only did because Germania has no access to a cable provider.
From what you describe, jsmith1299, Xfinity does the same as what you describe for Verizon.
And looking at the one example with TCM and TCM, TNT and TBS are all the same company, it looks like the issue has been around for some time.
And like streamfab, RecordFab, and CleverGet also 'claim' to support TBS, but have the exact same issue.
I don't know why those use adobe pass, and only they can answer. After reading what others say, I did try ESPN, and they ask for username and password to get into Xfinity.
I then had no issues with ESPN.
No matter what I do on TBS, I get this ...

But in the log it says I am not logged in.
2025:03:12-15:03:07 0x00007f88 [Info]: YouTubeDL: Type Analyze start "https://www.tbs.com/movies/men-in-black-theatrical"
2025:03:12-15:03:07 0x00007f88 [Info]: YouTubeDL: Media Analyze result false "https://www.tbs.com/movies/men-in-black-theatrical"
2025:03:12-15:03:07 0x00007f88 [Info]: YouTubeDL: error - "[TBS] men-in-black-theatrical: This video is only available for users of participating TV providers. Use --ap-mso to specify Adobe Pass Multiple-system operator Identifier and --ap-username and --ap-password or --netrc to provide account credentials."
AND THE LOG ENDS WITH
2025:03:12-15:03:14 0x00000b18 [Info]: UpdateDownloadStatus : Status_request_metadata --> Status_request_metadata_failed
2025:03:12-15:03:14 0x00000b18 [Info]: M3u8RootCB not ready content.
2025:03:12-15:03:14 0x00000b18 [Info]: UpdateDownloadStatus : Status_request_metadata_failed --> Status_request_metadata_failed
2025:03:12-15:03:14 0x00000b18 [Info]: M3u8RootCB not ready content.
2025:03:12-15:03:14 0x00007f88 [Info]: UpdateDownloadStatus : Status_request_metadata_failed --> Status_none
You can try to send the issue to SF support, with a log, but I would not hold out much hope.
As I said, the only thing even possible is to try searching https://www.justwatch.com/ for the shows or movies to see if other sites, like Tubi or Pluto, etc., might have them.
I hope, in a way, this helps you as well as Germania.