bazzite defaults to the Breeze cursor
I changed it to the Breeze Light cursor
Flatpaks (so 90% of graphical stuff on bazzite) show me the Breeze (dark) cursor
I experienced the same on Debian KDE
It does not work fine on all KDE Plasmas, but it sure must be great for some KDE Plasma users out there that their cursor theme works in Flatpak
Still eats ludicrous amounts of resources and makes file management and sharing through the app a bitch, either way