After I upgraded from the Fedora 34 template to Fedora 36, my Bluetooth device disappeared. I checked
in sys-usb, and this showed some Bluetooth errors. Googling those errors showed I needed a newer kernel. So I tried to use the kernel installed inside the VM, for both sys-usb and the target VM I wanted to use Bluetooth in.
However, now the situation is worse because, although sys-usb is able to detect Bluetooth, I am no longer able to attach any USB devices to other VMs at all.