Help with Denon AVR-2400H + Philips 50PUS6703 setup

Hopefully I'll be clear so I don't confuse anyone. I wasn't sure if I should put this in the TV section or here so please let me know if it's better suited in that arena.

So, I have a Denon AVR-2400H connected to my Philips 50PUS6703 TV. I have a Sky Q box and Chromecast Ultra, as well as other devices (Roku box, Nintendo Switch, Laptop plus more). I'd like to connect everything so I can make the most of HDR content whilst listening to audio via my AV system. I only have stereo speakers but I plan to replace them with a 5.1 speaker set eventually.

I've discovered that my TV only allows ARC via HDMI 1. This is an issue because weirdly, it's the only HDMI port that doesn't enable HDR

I think it makes more sense to have all of my devices connected to my AV system, rather than some directly to my TV and others connected via my AV System for day to day use. My wife expects stuff to just work with minimal remotes needed and to be honest, so do I. It would be annoying to have to constantly change settings.

How would you best advise I resolve this so I can guarantee HDR content? I've considered:

1. Connecting another cable to another HDMI port on my TV so I get ARC on TV apps like Netflix but I can also get HDR video from my devices without physically changing cables. The only thing is, I can't work out how to get video out of the second monitor out port from my AV system to HDMI 2 on my TV, so I'm scratching my brain. This also seems like overkill and would prevent me from utilising another zone in the future should I choose to.

2. Connecting an optical cable from my TV to my AV system. I understand that it won't carry Hi-Res audio and I'd like to make the most of my equipment so this is a disadvantage

HELP! Please let me know if I've missed some details that would help you to understand why I'm a bit confused about what to do