All of that sounds pretty in-the-GUI-config for KDE. The latest KDE versions even restore programs to the screens they were on when that screen is reattached on the fly and more features too.
Both the Debian and Arch wikis note that KDE is buggy on Wayland
Yeah absolutely not, like back when wayland was new sure but back then KDE was the only one with really any support at all for wayland, it’s very solid now, probably the best integration of any DE on wayland so far. Also that’s interesting that that’s the only mention of KDE, where they tried DE’s that are all well known to have pretty crappy multi-monitor and hot-swapping monitor support (which makes me wonder why they focused on those…).