Moving Displays On X11 Means Reconfiguring Everything?

I'm using Debian 12, KDE, in X11.

I have a 5120x1440 monitor I use with my laptop. I sometimes use my laptop display (3840x1080) when I'm undocked.

Using Wayland this generally just works. But I can't use Wayland (see below).

In X11, when I move between displays I need to change the resolution, the scale and the Task Manager height etc. It's a PITA.

This is likely a very easily solved problem. But I'm new-ish to desktop Linux and I'm unsure of how to solve it.

Any help appreciated.

(Why I can't use Wayland - it causes problems primarily for Zoom (I know, I know, it's a work thing). I assume this is because I'm also running an NVIDIA GPU on the laptop and Debian stable hasn't got those extra bits and pieces that have been added recently, in there to help make it work (that is the beauty and the curse of a stable distro like Debian 😀). As an aside I did think of trying Debian testing to see if that helped with this.