Sounds like gamescope is setting the window to 1440 as expected but the game is not. Have you tried it without any mods and does it work?

8600G is a very capable desktop processor

https://www.amd.com/en/products/processors/desktops/ryzen/8000-series/amd-ryzen-5-8600g.html

Cheaper to buy a new case

https://www.fractal-design.com/products/cases/terra/terra/terra-graphite/

https://www.silverstonetek.com/en/product/info/computer-chassis/SUGO14/

Nextdns.io for hosted DNS blocks ads and malware.

Also this list

https://github.com/pluja/awesome-privacy

A1 is recommended for compatibility and performance.

https://www.kingston.com/en/blog/personal-storage/memory-card-speed-classes

Steam Link has been around much longer and if you trust Valve to keep their software up to date chances are it’ll work at parity or better than Moonlight.

https://www.phoronix.com/review/intel-core-ultra-7-155h-linux

The cost of doing business means you should buy a license for each user that needs an account.

https://www.linode.com/community/questions/22605/can-i-set-up-a-smtp-relay-server-on-linode

Gnome terminal supports everything you’re asking for

https://help.gnome.org/users/gnome-terminal/stable/pref.html.en

TLDR, no

The cpu isn’t the only piece of the puzzle. 6.5 kernel is only just released, and at least just supported on Debian testing.

It’s not crazy that you haven’t setup any power saving profiles, or that the kernel doesn’t natively support these new chips and architecture.

HDMI 2.0 has limited support for high-res displays at 21:9. Check that your cables also are up to the task.

Running both the internal and external display at these high resolutions will be a challenge, only getting 30hz here makes sense.

Mr Chromebox has a ton of tools and info about this. https://mrchromebox.tech/