iPhone and Oticon hearing aids

In the last month, I am no longer able to connect my Oticon hearing aids with my iPhone. I was able to do it before. In the last few months, I was having some disconnect problems, and now I can't connect at all. I have, of course, turned Bluetooth off and on, turned the hearings aids off and on, disconnected the hearing aids and tried to connect again (and I get one request for Pairing which I click, but then I don't get the other one and neither are actually connected). Anyone else having this problem? I'm running OS 15.5 on my iPhone SE (newer one).