WatchDDD

Hello, I'm currently on an iPhone 11 pro. I've been using Evernote for roughly 7 years now. When I first began using the app, no login was required. I stopped using it for quite a long time and after I updated and opened the app it prompted me to login (I hadn't had a login email before) However, now all of the notes which I'd accumulated over the years appear to be gone. What can be done? Much appreciated