Regarding your last query, at this time our Registration forms do no have support for custom fields.
Many of our users have found success using a custom form and submitting registration data using our API endpoint. That documentation is available here:
As API registration involves setup mostly in third-party platforms, this is outside of our scope of support. You can reach out to our Official Facebook Group for advice on this subject.
That group is available here:
Category IT & Programming
Subcategory Web development
What is the scope of the project? Small change or bug
Is this a project or a position? Project
I currently have I have specifications
Required availability As needed
API Integrations Other (Other APIs)
Roles needed Developer
Deadline: September 28, 2020