If you’re as pissed off with Apple as I am for not supporting the same hearing aids on macOS that they do on iPhone/iPad please send them a product feedback form.
There’s really no reason why they can’t support hearing aids that don’t have bidirectional streaming. They work on iPhone and iPad so to have the Mac support a subset of devices is just ridiculous.
Send your feedback to Feedback - macOS - Apple
and select the accessibility category.
If enough people feedback they might do something about it. Thanks