You can edit and add more fields to your sign-up form in the admin portal, and the user can see and edit the information you added inside, but it is not shown in the sign-up form on the portal.
When the user signs up, It always shows this default signup page with these options:
To add more options to the signup form, follow these steps:
1- In the admin portal, click on the "User portal" from the top menu:
2- Click on "Edit Base", where you can add the fields you want.
For example, we added a gender field to the base form:
Now it is added to the user's table, and you can select and edit its data on your dashboard.
Also, the users can see and edit their information in this field on their profile when they log into their portal: