Pairing Phonak Naida P90-UP and Medel Sonnet 2 into single mobile device

Hello, I am currently using the aforementioned setup (Naida P90 and Sonnet 2) with Roger Select on my PC - pairing’s all fine, both devices stream sound simultaneously - as far as I know not via BT, but some other type of FM connection - for this to work I need to use FM cube battery cover on Sonnet2, which I have along with the standard battery cover, and the AudioStream battery cover. Now I have tried a lot of combinations, pairings, etc, but none allowed me to do what I want - connect my hearing devices in such a way that I could receive sound from my phone on both devices simultaneously. Each of the devices will connect properly on its own via Bluetooth and receive sound, but my phone does not have the option to force two bluetooth devices to stay as Active.

Is there a known workaround, or something I missed?

Use an audio cable to attach the Roger mic to your phone? I have an audio cable I attach to the Roger on, with an adapter to go to lightning on the iPhone. This works pretty well for me. Calls typically go BT (which I’m ok with) so that would probably take some manhandling to the phone to make audio from your calls go to your roger. Hope this helps.

WH