I have OpenSUSE Leap 15.3 installed on a sandbox PC. The NVidia video card is configured correctly using the proprietary drivers. I wanted to configure a handful of desktop effects like wobbly windows (as I have done before under Leap 15.0, 15.1 and 15.2). But most of the nice effects seem to have disappeared in the KDE Settings panel.

Any idea what's going on here ?