So have qubes installed (havent setup the usbqubes yet) and while the security implications of bluetooth are well known to me; would like to somehow enable bluetooth for audio while running Qubes 4 on a 15v3.
Any help or ideas? If this were pureos it would be simple but not sure right now.
First thing which comes to my mind is IOMMU/vfio - map the whole device to VM and then run inside the OS with proper driver - whatever it will be.
Bluetooth is working on Qubes OS v4.2.0 through the secure sys-audio setup. See Librem 14 Bluetooth device invisible to dom0 and sys-usb - #6 by PeakUnshift - User Support - Qubes OS Forum.