I've got two beanies that don't really fit over my ears. Not sure if that would work for you but may be worth a try. Another option would be a heavy duty wool baseball style cap if that may work better with the hearing aidsYours is slightly different than mine. I have the items will try that!
Beanie hats don’t work well for me since I wear hearing aids. It creates feedback and squeal that others can hear. A big distraction. Can’t cover my ears.