How to display the profile and additional fields in the application when working with Firebase

[vad23]

How to display the profile and additional fields in the application when working with Firebase.
Interested in the output of the fields:

1. Surname.
2. The status of the progress in the application.
3. Output of data filled in during registration.
4. Output of photos and other functions.

[Michael]

As mentioned here: Users in Firebase Projects

Firebase users have a fixed set of basic properties—a unique ID, a primary email address, a name and a photo URL—stored in the project’s user database, that can be updated by the user (iOS, Android, web). You cannot add other properties to the user object directly; instead, you can store the additional properties in any other storage services, like Firebase Database.

After you have registered a user, add that user (and any additional fields) to a database