This set of functions can be used to add custom fields during user registration during checkout or open registration.
Use this function to display a custom user profile field on the Information tab of the Student’s profile on the LifterLMS Reporting Screen.
Using filters you can output the information (for both display and editing) on the user’s profile on the WordPress admin panel. Under “Users” from the WordPress side menu.
The filters are documented here: https://lifterlms.com/docs/lifterlms-filters/#admin-user-custom-fields