I have a Framework 13 with the super button instead of Windows button, but I've set it up similarly to how the Windows buttons works in Windows. Pressing it by itself opens the KDE app menu, super+D goes to desktop, super+L locks screen, super+[ or ] moves around virtual desktops, super+W shows overview, supe+T shows tiles config, super+arrows do snapping, super+PgUp/PgDn/X for maximize/minimize/close etc.