The Account Created Screen (registrationSucccess)

The registrationSuccess screen appears, briefly, after a user has successfully created a new account. After the account has been created the registrationSuccess screen is displayed; a few seconds later, after the user is logged in and is issued an access token, the loginSuccess screen appears. A few seconds after that, the user is redirected to the page specified in the OIDC login client used in the authorization request.

Registration Success Screen: Technical Documentation