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.
I have mine setup on a Supermicro itx-based machine with an Intel n3710 and 8G of RAM. It has four Intel-based ports but you can easily get away with two.
I used to run a Zotac ci323 with dual Realtek nics. Works fine for 300M up/down.
You’ll want two ports, one for WAN one for LAN and most nics will support VLANs if you need more than that. Any VPN or encryption will increase your cpu requirements. If your needs are low a cheap dual-nic Nuc like device works great.
depending on your use case these are cheap and cheerful.
https://www.newegg.com/sapphire-radeon-rx-6400-11315-01-20g/p/N82E16814202416
Gnome terminal supports everything you’re asking for
https://help.gnome.org/users/gnome-terminal/stable/pref.html.en