Oh wow, this sounds awesome. Never occurred to me that you can delegate RC to someone and they can claim accounts.
I've been working on a way for onboarders to become "trusted" by larger stakeholders so that the larger stakeholder would automatically create an account on behalf of the onboarder upon request. But this RC delegation approach also sounds very good. Just not sure if it can have a good flow for the person being onboarded such that they don't need to wait for someone to create their account.