Apple TV 4k

So I have the newest sony oled tv a90j hooked up to my sonos arc surround sound via earc hdmi 2.1. When I play any streaming app Hulu,Netflix,ESPN,YouTube and Disney plus from the google tv that comes with the tv already I get Dolby digital 2.0 or Dolby digital plus 5.0 or Dolby atmos which is great. Now I bought the newest Apple TV 4K and when I play any other app other than Netflix (I get Dolby vision 5.0 if set to Dolby vision or Dolby atmos if set to atmos only on Netflix)all I get is stereo pcm no matter what setting I put on the Apple TV in. Tried Dolby atmos setting on Apple TV or Dolby digital setting on Apple TV and nothing all I get is stereo pcm no matter what app I play Even Apple Music on the Apple TV all I get is stereo pcm. Any ideas as to why or how I can fix it? Or is Apple newest 4K Apple TV can’t pass any Dolby content unless the app actually has it like Netflix for example.