Pair and connect yes, but not listening/using at the same time.
BT connection will be there, but select when turned on will activate the roger program (assuming you have it set up on automatic). If you get phone call, HAs should switch to BT call program automatically. Didn’t tested it though so can’t say if switch is smooth, nor what happens after phone call, I assume it goes back to autosense.
Resound’s Multi-Mike works great - it has a Jack for stereo plug from most any audio device, including output from Listen’s Hearing assist systems. It links directly to HAs via Bluetooth. The mike is, of course, mobile, for moving speaker (the human kind) - constrained by Bluetooth limits. LRA