I hear your frustration! Thanks for posting.
I trialed some Moments Sheer 440s, and the buttons worked the way Paul described them–right for volume for both HAs, and the left to decrease the sound. I used the “turn off” feature when I needed to reset to add or change any features.
I have ordered some Moments Sheer 440s, and I expect to be able to use the sound feature on the hearing aids themselves. I don’t want to have my phone on my person all the time either. Does your audiologist work with Widex a lot? I ask that because so many practices predominantly sell a certain brand of hearing aid.