Thanks to this app https://audiorelay.net/ I’ve discovered that I can use just my [Android ] phone to stream from my Windows laptop to my Signia Hearing Aids.
Without using any overpriced streamers from HAs producers.
You can stream from MacOS and Windows, and it will connect to your phone either via wi-fi or usb [costs a premium subscription], Wi-Fi has a ~10ms delay [fine for music and podcasts] while USB has ~0.2ms [good for games and videos].
It works great.
[I know that Phonaks can do it natively via BT Classic, so that info is for any other ASHA enabled HA]