This is achievable using RegistrationMagic and ProfileGrid integration. Steps to display RegistrationMagic fields on WordPress User Profile page:

1. Install ProfileGrid. Here is link: https://wordpress.org/plugins/profilegrid-user-profiles-groups-and-communities/
2. Create Group G. Make RegistrationMagic form F as default registration form of Group G via Group Settings.
3. Create fields in Group G. Map these fields with form F using map with option on ProfileGrid Edit Field page.
4. Submit form F in logout state as user U.
5. User U will be registered and become member of Group G.
6. All the mapped custom field values will display on WordPress User Profile Page.

This is also how I expected this plugin to work, I didn’t expect it to have a separate section for users.

You will need to customize WordPress My Account page in order to achieve this.