Further to my previous remarks... I just found a workaround to get synchronised audio and video with airplay in the 14.2 version (for selecting airplay devices see other posts). In the video and audio settings of your appletv you can make changes to the Match Content setting. I disabled Match Frame Rate and it magically solved the lipsync issues.

Dear all, although I read suggestions that this issue is fixed (holding te tv buttons for long time and choose a device), it really isn't. With my new short through beamer, apple tv and Sonos boxes it becomes impossible to have a synchronized audio video combination as far as I have tried. I do not see a way to use the audio calibration feature that used to work when you could select the audio devices in the setup screen. Yes you can select the Sonos room, and sometimes it works to stream audio. Although not the cursor movement (which already should make you suspicious) and not in the audio calibration menu. And when it please audio, there is major delay. Whick is to be expected, but I cannot correct the delay by default... A thought creeps in my mind that apple only wants to support their new Homepods... I hope not. This may only be a small mistake and the original approach is corrected... right?