Streaming TV Audio To SONOS

Attempting to find a method for streaming TV audio to the SONOS speakers using their app on the iMac or iPhone or iPad. Contact with the providers has not been successful. Each refers me to others, Catch 22.

TV/Internet Provider: Xfinity/Comcast for the internet connection and cable TV, using Apple TV 4K. SiriusXM streaming to SONOS is active, linked to my auto account.

Why: Mostly for music specials such as Garth Brooks, 50’s & 60’s reviews, etc.

Checked AccuRadio, iHeart, Radio.com, SiriusXM, etc

Have you ever heard of a method to stream TV audio ?