Update: SUCCESS! Found this on Amazon for $31.44. Works great with my Phonak P90s.

Simple hookup. Turned HA’s off/on and they paired immediately. I’m adjusting the volume using toggle switch on the HA’s. So far it sounds great. My wife is using her BT headphones simultaneously. Thanks for all the help folks.

https://www.amazon.com/Bluetooth-Transmitter-Receiver-Aisidra-Simultaneously/dp/B09DD33SDD/ref=sr_1_3?crid=3034MGWNIWD86&keywords=aisidra+bluetooth+transmitter&qid=1645153731&sprefix=Aisidra%2Caps%2C88&sr=8-3

I don't know how you can do it with an android phone, but there are standalone bluetooth transmitters that do that. https://www.amazon.com/Bluetooth-Transmitter-Receiver-Aisidra-Simultaneously/dp/B09DD33SDD/ This one uses 3.5mm jack, not USB, but there are also others that will use TOSLINK (Optical). This one seems to present itself as an audio card https://www.amazon.com/Reiyin-WT-HD06-Bluetooth-Transmitter-Wireless/dp/B082VYBVVD/

You can get a Bluetooth transmitter that accepts analog input to transmit to Sonos. Like this one:

https://www.amazon.com/dp/B09DD33SDD/ref=cm_sw_r_cp_api_glt_i_3S4ASH1C6X7TTF96AWB8?_encoding=UTF8&psc=1