The thread seems to have drifted a little from what you seem to be asking. It’s been a while since I got my aids and more Bluetooth aids & options have come into the market but I can tell you the reasoning I used when buying mine which are bluetooth, but mono even tho a stereo Bluetooth HA was available to me.
While I really wanted the Stereo, I got Oticons because even tho it was mono (delivered to both ears). I chose them over the phonaks which had true stereo because the Epoqs were a better match for my hearing loss. Also, the Oticon streamer acted as both a Bluetooth reciever as well as a remote control so I did not have to buy or carry another device. And, at the time, the oticon streamer products cost less than phonaks.
I still wish that Oticon would come out with a stereo solution, but overall I decided that the primary reasoning in my HA choice should be how the HAs made me hear speech at work, home and on the phone. Everything else (streaming music & surround sound) was gravy and not essential.
I guess I’m saying that the desire for stereo should not be the compelling reason for an HA choice, rather, how the HA compensates for your hearing loss is. Course if you can have both, go for it.