Create an email address ending with .fr

Hello, I want to ask you a question. When I was small, I created an account on an app, but I made a mistake between example@gmail.com and example@gmail.fr, so I would like to recover my account. I found a solution; I will create the email address for the account. However, as I mentioned, I used .fr at the end, and I don't know how to create an email address with .fr at the end.