I tried that today but problem is that 3.212 and 3.212 beta 1 both fail to import any Mullvad configuration.
It says the process will take approx. 20 minutes but then nothing happens.
Tested on B1300 Convexa-B. Have not tested with the Brume but I assume the problem will be the same.
I can wait for the next Firmware version if there is a chance this solves my issue with the vpn policy & port forwarding.