AMD does automatically switch to a "power saving" profile on battery that lowers power consumption significantly vs on charger, but if you want, you can tweak even further with a fantastic tool: https://github.com/FlyGoat/RyzenAdj - it's a simple CLI util so easy to set up w/ udev rules to run automatically. On my old Ryzen laptop, I have it set to run `ryzenadj -f 48` when I go on battery, which limits the temperature below my laptop's fan hysteresis for a very efficient and totally silent system, and `ryzenadj -f 95` to set it back, but you can also adjust most power and clock parameters (not everything works on Ryzen 6000 yet, but the basics should). The docs/wiki are also great and has lots of charts illustrating what each setting does: https://github.com/FlyGoat/RyzenAdj/wiki/Renoir-Tuning-Guide

The other tool you could check out (and use in conjunction or instead of ryzenadj) is a tool called auto-cpufreq: https://github.com/AdnanHodzic/auto-cpufreq - it lets you switch governor and turbo/clock speeds automatically base on battery if you're just looking for a simpler way to set that.

5.19 has a bunch of amdgpu fixes that might fix some things https://lists.freedesktop.org/archives/dri-devel/2022-April/... but sadly there are often also sometimes regressions/weird bugs: https://gitlab.freedesktop.org/drm/amd/-/issues?page=90&sort...