My Sonos Amp will not connect to my Furion outdoor TV. When going through TV setup, the app says “CEC not connected”.

The Furion TV uses WebOS. 

I am using HDMI 2.1 cables. I am also using an audio extender over Ethernet. 

I tested with my TCL TV and it worked perfect. I used the same HDMI cables and the audio extender. 

Any suggestions?