Your question was “what?”. Appreciate the follow-up question though.

Wayland based tiling compositor

https://github.com/hyprwm/Hyprland

With the CLI guided install the barrier to entry is also super low now. The only thing I’m still battling is GPU video acceleration with Firefox.

Give CachyOS a shot

https://cachyos.org/

The problem is you used Debian which is missing bug fixes for KDE, and is on a frankly ancient 5.27 - I have had nothing but an awesome experience on KDE 6, with both VRR, and HDR, working under Wayland.

Recommend trying a rolling release