I just installed CachyOS and moved the defauklt panel to the top like I always do. I then went to add my two empty panels to the bottom and the right side and when I right-click the desktop there is no option to add more panels. I went through settings, edit mode on the main panel and nothing. I finally rebooted in to Garuda where I have all 3 panels and right-clicked the desktop and the option to add more panels is missing there as well. This behavior is in both x11 and Wayland in Plasma 6.0.5 on a fully updated Arch based OS’s. https://discuss.cachyos.org/t/ability-to-create-additional-panels-missing/389 https://discuss.kde.org/t/missing-add-new-panel-option/16179
It was removed from the desktop context menu and now only appears in the toolbar that pops down from the screen in Edit Mode. So enter global Edit Mode and you'll see it up there.
IThis was not well thought out. No one wants to have to enter edit mode just to add another panel that they are just going to enter edit mode on to tweak. It's as bad as hiding the context menu item for adding widgets. Looks like rediculious tweaks are bemade instead of bug fixes being handled.