On my samsung tv i played the show on hbo max then went to my tv settings >sound>expert settings>Digital output audio format>dolby digital. Apparently you can only select dolby digital while an app is playing a video that supports it. Prior i had pcm selected and when outaide of the app the dolby option is greyed out.
Method 1: Check to make sure Apple TV servers are operational. When Apple TV is not loading, most issues will usually be with your network or playback device. Before you go into the other fixes listed below, it is worthwhile to check that there are no issues or outages with the Apple TV platform. This is also a helpful tool to try when Apple TVAGFd.