I tried searching the existing posts without any clear information for my problem.
goal: stream audio from Apple TV app such as YouTube tv over wireless to Sonos amp
Setup:
-ATV 4K connected to Samsung tv over hdmi (2 setups one atv connected over Ethernet other over wireless)
-Sonos amp with speakers connected to internet router over Ethernet
Sonos amp speakers works when I stream music from Sonos app or AirPlay youtubetv on iPhone
on either Apple TV (current fw) Sonos appears as an audio out but when selected nothing is heard...