Apple TV 4K
All HDMI cables are 6’ and are capable of handling UHD signals.
Apple TV -> uhd/hdr in
Avr Audio -> Yamaha HDMI 1
Uhd/hdr out -> Vizio HDMI 1 (ARC supported port)
AVR Key side switches set to middle position on both
After the introduction of the AVR Key, ,y Apple TV remote can no longer turn the volume up or down. Turning on/off the TV with TV remote no longer turns on/off the Yamaha receiver. My on-screen display for the Yamaha no longer appears.
I don’t have a PC, only Macs, so I cannot use the GUI.
Already asked in support server, already answered, please choose one way of getting support and stick with it, otherwise you just delay answer for you, us and others.
If you want TV (root) to see AVR, then just add cable between TV and AVR.