Wifi passwords are gone

A few months back I stumbled on a menu which tells all the wifi networks I have joined and what their passwords are. I remember there being hundreds of wifi networks I have connected to. This menu was in the edit button on the top right of wifi settings on iPhone. I have upgraded to iOS 18 and I checked to see my wifi networks (same place in settings) and all my wifi networks are gone. There are only three and those were the networks I have connected to in the past couple of days. Even in the passwords app, there are only those three networks. Where have they all gone?? All my known networks just disappeared. But, I can still connect to networks that I connected to in the past and my phone connects without having to enter a password but my known networks list didn’t have those networks listed down. My phone remembers those networks I just don’t see them in the passwords app or anything. What’s going on??