While other flatpak apps have no problems. Any suggestions?
IMHO I would avoid the ublue distros and just go for official fedora spins. The guys have good intentions, but they don’t have the means to maintain that many distros “properly”. I often end up enabling copr packages for bazzite in my fedora install, just to find out the program doesn’t work.
That being said, as the other comments told you, you can still install native apps on immutable distros, it’s just a bit more work. I don’t expect distrobox or toolbox to be much faster than flatpak, as they are all just containers with a nice cli, except flatpak is easier to update. But trying costs nothing
I’ve “solved” using distrobox, it work pretty well and I don’t see any lag. Bazzite is a very good distro imho, the problem is more on Firefox here.
While toolbox and distrobox seem very similar, distrobox comes with a slight warning :
but they don’t have the means to maintain that many distros “properly”
That’s why they’re not separate distros from Fedora (as in, they don’t even host their own RPM repos nor maintain their own set of Fedora packages like Manjaro vs Arch) and purposefully so. It’s just stock Fedora with a few configs, third party repos/packages, and some scripts preinstalled. The entire thing runs on GH actions.