Linux 101 stuff. Questions are encouraged, noobs are welcome!

I have a 144Hz ultrawide monitor, and recently I bought another little monitor for music/Discord. However, even though I'm running it on Wayland, If I try to change the framerate of the big monitor in KDE settings, it spits out an error (something about the framerate not being compatible with the driver - unfortunately I can't check it anymore) and doesn't change it. This is on Arch running the latest plasma-meta, and an AMD GPU.

I've tried looking for a solution to this problem, but practically all of them just say "use Wayland", which I already am. I found a Debian Bookworm USB I had lying around and thought I'd see if the issue persisted. It turns out that it doesn't - It works perfectly.

Does anybody have any ideas as to why this doesn't work on a newer version of Plasma?

I'm not necessarily against switching to Debian to get this working, it's just that Arch is what I'm used to.