I am attempting to attach my Blue USB Mic to a VM in Qubes 4.1. Using “pavucontrol” in the dom0 terminal I have verified that the device is connected and recognized, however the mic still does not appear as a mountable USB device.
[update]
It appears that the device is the default audio and microphone device in Dom0 (via the speaker icon in the taskbar) - So it is being recognized.
Also, did you mention Blue because that’s the color or is it not merely USB but also Bluetooth (re: there are known issues about Bluetooth at this time). Details can make for a very messy experience even if the hardware & software can ever play nicely with each other.