Hello,
I am not getting Dolby Atmos if I play shows or movies through Apple tv 4k(I am only getting dolby digital 5.1). If I play them via TV app(like netflix or hbo max)it works just fine. Sonos app show atmos. Where could be the problem(also in apple tv i cannot select atmos anywhere) and i am running tvos 17.2. Tv model is Samsung q60c