I bought an Apple TV 4k back in the summer and have been really enjoying it. Once the Apple TV app update came along I managed to get a number of streaming services to work flawlessly in the Apple TV app, in the Up Next section. Hulu, Amazon Prime, etc. CBS All Access used to work perfectly, new episodes would pop up and I could watch right through the app. We sub to CBS AA directly through the app, not as an Apple TV Channel.
Some time in December Apple removed CBS AA from the Connect To list of apps. It no longer shows up. If you go to Apple's website they still list CBS AA, but it hasn't been updated since mid-November.
support.apple.com
Neither Apple, nor CBS AA has an answer as to why it was removed for people that subscribe through CBS AA directly. Apple tells me if I want the feature to subscribe through their TV channels, while CBS tells me to ask Apple. I'm a bit disappointed that Apple would do this and take the functionality away just so they force you to subscribe through them and they get a cut.
Some time in December Apple removed CBS AA from the Connect To list of apps. It no longer shows up. If you go to Apple's website they still list CBS AA, but it hasn't been updated since mid-November.
Availability of supported apps in the Apple TV app - Apple Support
Learn which apps support the Apple TV app in your country or region.
Neither Apple, nor CBS AA has an answer as to why it was removed for people that subscribe through CBS AA directly. Apple tells me if I want the feature to subscribe through their TV channels, while CBS tells me to ask Apple. I'm a bit disappointed that Apple would do this and take the functionality away just so they force you to subscribe through them and they get a cut.