I have a Flydigi Vader 4 Pro, the USB dongle is connected to my ROG Ally, which is running Bazzite.
When I connect the controller, the controller shows up in dmesg The controllers /dev/input/ entry also shows up, I'm even able to
cat
cat
the endpoint and see data from the controller as I press buttons from the controller Launching KDEs Game controller settings page, I only see one controller, the Allys builtin. In steam, the Flydigi does not work.