Can't Find Password Created For A New App

I downloaded a new app that required to create an account. While registering, my iphone suggested it creates a password for me. I usually don't use this but this time I did. But now that it is done, when I try to log in to the app, it doesn't provide me with a password at all, I go through the entire password list twice to find the one for this app and it's just not there!

I am effectively locked out of this app unless I reset the password because I just don't have it. It makes no sense. Where did the password go? Am I missing something? I am in Settings/Passwords going through the list paying attention in case the name is slightly different but there is nothing...

I have an iPhone SE 2020 with iOS 17.5.1