I've used Brume 2 with an unsupported dongle for uplink and it worked great for several days of heavy usage, however, the GLi interface doesn't realize that it has a functioning uplink connection, so certain functions do not work properly. See also A mt76 wifi dongle success
It would be nice if the GLi firmware, on Brume 1 and 2, would at least support having uplink from an unsupported source, in other words, just act like there's a working uplink when there's a working uplink, even if it's via an unexpected device, rather than staying in "No internet connection! Find a network to reconnect" mode.