HDMI port for Apple TV 4K 2022

A80K (2022) should have 4 HDMI ports on the back; 2× HDMI 2.0, 2× HDMI 2.1. All of them compatible with Apple TV (any model).

As Apple TV 4K (3rd generation) has an HDMI 2.1 port, you would get the most out of it when connecting to an HDMI 2.1 port on the other side of the cable.

• If you have an external audio system with HDMI, then connect that to HDMI-3 (eARC).
• If you have connected devices with HDMI 2.1 ports, then connect your favorite/​most demanding one to HDMI-4. unless you have a modern AV receiver (HDMI 2.1 out), then I would advise to connect all HDMI devices through that.

Sounds like you've got a nice setup. Since it's working fine and you're basically geeking out to determine what's 'optimal', I'll chime in.

For the sake of consistent Dolby Atmos performance, and given the ATV4K's habit of processing Dolby Atmos streams and sending (uncompressed) Dolby MAT data out via HDMI, the conventional wisdom is to connect the ATV4K directly to the Atmos-capable sound system using an HDMI 2.1 cable.

Since you have a higher end Sony TV with HDMI 2.1 and eARC, your current config will probably continue to work perfectly fine. That said, don't be surprised if certain movies, with really beefy multichannel Atmos soundtracks, cause your Sony's eARC to hiccup and experience occassional audio dropouts.

If it were me, I would run only the one HDMI 2.1 cable from your soundbar's HDMI out to your TV's eARC port, then connect the Sat box and the ATV4K directly to your soundbar's HDMI inputs. It sorta comes down to cable management... I like my TV on a swivel-capable wall mount with only the well-hidden power and HDMI cable running to it.

The following 'connection diagram' is from a nice write-up on Dolby Atmos by Nakamichi (link below).

https://www.nakamichi-usa.com/the-ultimate-dolby-atmos-guide

if it have a hdmi port of minimum version 1.2 then you can connect the appletv box to just about anything including computer monitors

I am here to seek expert advice whether my Apple TV 4K 2022 is in right HDMI port!

In my opinion, it is. Enjoy.