SUMMARY STEPS TO REPRODUCE 1. System Settings > Workspace Behavior > Virtual Desktops > Uncheck Navigation wraps around 2. Make sure Mouse Actions in Desktop Settings include Vertical-Scroll > Switch Desktop 3. Scroll on the desktop OBSERVED RESULT It still wraps around. EXPECTED RESULT It shouldn't wrap. Stop at the first and last desktop. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux KDE Plasma Version: 5.20.0 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION Related bugs https://bugs.kde.org/show_bug.cgi?id=286297 https://bugs.kde.org/show_bug.cgi?id=361672
This was fixed in Plasma 5.22 IIRC.
It is indeed fixed, thanks!