It just occupies more space STEPS TO REPRODUCE 1. Enable floating window 2. Observe OBSERVED RESULT Panel doesn't float, it just resizes to occupy more space. EXPECTED RESULT Panel gains margin on the sides. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.7.8-arch1-1 (64-bit) KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 ADDITIONAL INFORMATION Overall plasma 6 is missing styling(?) krunner, application launcher menu, pager in transparent and no outline for virtual desktops(still clickable), icons on desktops doesn't glow when hover mouse over them nor when you select them, can't resize resizable elements such as application launcher, status and notification and others. Same behavior both on Wayland and X11. Default dark theme Breeze. GPU: Integrated AMD Vega https://streamable.com/watu7v - Floating panel doesn't work as intended. https://streamable.com/oolxaf - Overall behavior.
Just checked what will happen on new user, still the same behavior.
Are you using a custom Plasma theme? If not, these issues feel like GPU driver bugs to me. Let's use this bug report to track just the issue with the floating panel misbehaving.