Apple TV 4K and LG C1

Hello 

I have question I have an Apple TV 4K 2021 and LG C1, and connected to sonos playbase with surround and sub. When I play YouTube from LG webos the Sonos app shows Dolby digital 2.0 and it sounds louder and better while I play the same YouTube content from Apple TV YouTube app the sonos app shows as stereo pcm and I have to increase the volume to match the webos app. The same happens for curiosity stream and other apps as well. Is there a way to get the Dolby digital 2.0 on the Apple TV ? Many thanks