Not practical. There is no direct way to do this. Only SONOS products can connect to BEAM in a surround configuration.
If you want to go to a LOT of trouble, you could add a SONOS AMP in the surround configuration, scale the AMP’s speaker output to something that a Bluetooth transmitter would accept, then send this to the 6000’s.
TV Bluetooth surround audio cannot be setup/used with the beam it does not have a Bluetooth transmitter/receiver. There’s no way to achieve it with those ‘active’ B&O speakers, but there would have been an option had they have been the ‘passive’ beovox 6000 speakers, as you could have attached those to a Sonos Amp.
So your are stuck attempting to setup your beolab products with a Sonos HT device like the Beam.
Thanks guys, you’ve confirmed what I thought might be the case. Looks like I’ll be buying a couple of SL’s to go with the Beam and then just use the B&O 6000’s for listening to music, nice speakers though.