All effects/filters are essentially third party as they are coming from avfilter or frei0r, and are part of the MLT framework. Kdenlive doesn’t have its own effects per se.
The installed version is looking for avfilter and frei0r packages and takes the installed filters; the appimage has them all “on board”. So if you use the latest appimage version 23.04.2 you’ll have the VR360 effects.
anyone know how to do the same with a Mac install? I know it would likely involve copying the same bits into the kdenlive “Package Contents” directory, but so far I haven’t had any luck with doing so. it doesn’t appear to exactly map to the unix dir structure.