I’m working on a solution. I’m almost there. See my post below.
My goal is to keep it Auth0 “native” as possible, with minimal-to-no backend work required outside Auth0. It does require some frontend work (React, in my case) to handle a silent re-auth’ing of the user from their personal context into the newly created org context.
I’ve submitted feedback to Auth0. If they allowed their Forms to be triggered before sign up or allowed the form to render regardless of user context (biz vs personal). It would make things easier.
I will update it once I finish ironing out some kinks.