AFAIK, No hearing Aids have bluetooth built in…
The Bluetooth does not link directly with the HAs, rather it links with the iCom then the iCom (or Streamer) uses the neckloop to transmit an induction field to a digital T-Coil inside the Aids.
There are Bluetooth Neckloops out there that will work if you have normal T-Coils in your aids. (If the Aid has the ability to have a phone (“T” or “M&T”) setting, you can use these 3rd party BT Neckloops). They run anywhere from ~$125 - $250, depending on function etc. Some require the use of ear hooks but others are a simple neck cord just like the iCom & Streamer. I don’t if any of them are stereo.
Admin of this forum sells spme. (click on the banner ad above) or do a google search for Bluetooth Neckloops for more models and vendors. I don’t have any experience of them so I cannot advise as to the function.