Using an iPhone 11 Pro Max on iOS 14 Public Beta 2 and an Apple TV 4k on tvOS 14, audio does not seem to be working when streaming a video from my phone to the Apple TV via Airplay.
Audio is working on the Apple TV when playing something on the device itself.
The video is not muted on my iPhone and plays audio fine if I switch back to my phone.
Sending a video from my iMac to the Apple TV via Airplay works fine (including audio).
I have restarted my phone and the Apple TV, and the problem persists. There just isn't no audio at all when streaming videos from the phone to the Apple TV. Music from the Apple Music app plays just fine with great audio.
Any ideas?