I recently got the new apple tv. previously had an older one and home theatre was great. now, when I connect my HomePod pair as audio output, no video/ audio will play through the Apple TV. works fine when I use TV sound. Help?

Update:

Have you updated the tvOS on Apple TV yet? If not do that

Make sure all software is up to date on HomePods and the device you used to set up HomePods.

Restart: Apple TV & HomePods (use the Home App for the HomePods)

Have you set this up with the default audio setting on the new Apple TV and it’s disabling picture & sound?

Or are you using the AirPlay method: Play the audio that you want to stream from your Apple TV, then press and hold Apple TV App/Home  to bring up Control Center. 

Select AirPlay .

More: Adjust video and audio settings on Apple TV - Apple Support

The same situation. The previous version is next to it and everything is fine. As soon as I reconfigured to apple tv 2021, the problems started. I asked for a replacement device. They brought a new apple tv and the problem was repeated. At the same time, for the return period, I used the previous version of apple TV its work ok. HELP