There’s an issue on Bazzite’s repo asking for new-lg4ff and other kernel modules to be added. While the issue is still open, it describes a workaround^[1][2] but it requires building the DKMS module and layering it on top of Bazzite on every kernel update.

Edit: re-reading your post and Oversteer’s README your wheel should be supported by the default kernel, I’m not sure new-lg4ff will fix your issue (and the latter does not list the G920). The issue must be somewhere else. I wish I could help you, but I have yet to try Assetto Corsa and Dirt Rally with my Driving Force GT on Bazzite.

I haven’t used an immutable distro, but if it’s a problem, I’m sure that there’s a way to defeat the immutability. If it just mounts the root filesystem read-only, then

# mount -o remount,rw /

Will probably do it.

It will work until the next reboot (and I believe it won’t work on Fedora 42 as it now uses composefs), on Fedora Atomic Desktops you have to use layers to add additional packages using rpm-ostree

(Edit: formatting)