Apple TV 4K does not have a source_list

I have three Apple TV’s. an Apple TV 4, Apple TV 4K and Apple TV 4K (2nd gen). The Apple TV 4K does not have a source_list property as the others do. Its running the latest OS, 16, so I’m at a loss here. Anyone have this issue? Can it be resolved?

I have two 4K Gen 2’s and one 4K Gen 3. All of them have a source list.

Thanks for the reply.