I recently switched to Bazzite from Pop! and cannot get my Bluetooth to see my Switch Pro controller. It works fine wired, I can connect other devices via Bluetooth, the controller will connect other computers fine.
I've tried two different USB Bluetooth adapters on USB 2.0 and 3.0 ports on the front, back and on the extra USB port on my keyboard. I've rebooted, restarted the Bluetooth service, and googled the hell out of it, but most problems I've seen are from years ago before Linux officially included the Pro controller driver in the kernel.