Hearing aids don't pair with iOS 18 or 18.1 on iPhone
This is a bug. Numerous users are having the same problem even though they have different makes and models of hearing aids. The problem is with iOS 18.
I never had a problem with previous iOS releases. I tried numerous times to pair my Jabra hearing aids using the prescribed Settings > Accessibility page or the Jabra Enhance Pro app. A couple of times it seemed to accept the pairing of each hearing aid but nothing happened.
Let Apple know. Email accessibility@apple.com.