4K TV OS Update -- Apple took away some really good functions

I use to (mid-late 2024 & before for years) be able to play music through my home receiver, and specify what Photo album that the screen saver would shuffle through. But the biggest sin was that the ability to specify how long each picture would stay on before the shuffle. I used to like 10 seconds -- It gave people in my living room enough time to ask questions about a particular photo before it would shuffle to the next. Now there is no control, it's default is close to one second.

How can I back Rev to an earlier version of the TV OS (probably TV OS 17ish?

Thanks