No sound airplay
There is no sound when using airplay
Apple TV 4K, tvOS 14
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What is your audio setup? Where do you expect sound to come from?
Are you trying to stream just audio (music, podcasts) or video (video with audio) using AirPlay?
What content are you trying to AirPlay?
↳ Is it a local file? What is its audio codec?
↳ Is it an online stream? From what service?
From what device and app are you trying to AirPlay?
Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch - Apple Support
If screen mirroring or streaming isn't working on your AirPlay-compatible device - Apple Support
Apple TV 4K, tvOS 14
Users are advised to keep their devices up to date, for best performance and support. We’re on tvOS 15.6 now.