So HDMI CEC is supported. But not via remote control. I.e. communication via HDMI cable. The connected devices must also support HDMI-CEC. With older Samsung devices it is called Anynet+, with LG Simplink or with Sony Bravia Sync.

Yes my amplifier also switches on the Tv but when I only listen to the radio I don't need it to switch on the Tv otherwise the amplifier is a spice product the sound control direct treble bass without going into the menu is great I have been looking for this for a long time I had a Yamaha 500d 5.1 revicer that was a good amplifier so the new Onkyo is not much better but I have to say that the Yamaha is an older device the Onkyo is new gr Fredy

In addition to several Zohnen, the TX-NR6100 also offers other future-proof functions such as 3 x 8K inputs and HDMI 2.1 interfaces. Since Harmony has been discontinued by Logitech, future-proofing is less guaranteed. What you have is still supported, but Logitech is unfortunately no longer developing the Harmony platform.

No, this is a full amplifier with two zones. Analogous to Sonos, rooms can be created and individually controlled via the app. No scenes / actions can be created. I use Logitech Harmony for actions.