I reset my Apple TV HD back to 14.7 from 15.1 beta 1 and as 15.1 didn't resolve it. They released beta 2 yesterday however I've not updated back to this. I have however updated my iPad to iPadOS 15.1 beta 2 and the tv app still doesn't fill BBC programming in the up next. The bug report I sent on the 16th is still open and showing that other users are reporting.
it may be an app programming issue opposed to a tvOS issue. The way the up next is handled from apps could have been altered and thus not working for apps which have not been updated.
you might be right but this is inexcusable if true.
You'd have thought that if that were the case that apple would have contacted the app developers in question and informed them of the behind the scenes changes and how to update their apps accordingly.
Maybe they did this and that's why the likes of Disney+ and Prime video are still working fine.
Its not as if there are thousands of apps that integrate with the TV app - there's only a finite number in each country and in the case of the UK its Disney, Prime, iPlayer, All4, My5, ITV hub, UKTV play, Britbox. These could have been easily handled ahead of TV/iOS release with the 3 month lead time.
I must admit, iPlayer is the main culprit here, but to be fair I've noticed that ITV hub is also missing shows and All4 too. Channel 4 are having some big problems at the moment very publicly so there is a backend IT issue there.
I don't accept that My5 is still working fine (as it appears to be) and ITV and iPlayer are not.
Disheartening to see the 15.1 beta hasn't fixed this. I really rely on the TV app and use it every day and when shows are not appearing on it then its really complicated to keep track of things properly.