Nick here from Shopify.
I'm wondering if the Shopify Single Sign-on is something which could benefit you here. The basic principle behind single sign-on is that store owners and staff members can use a single, unified email address and password to log in to all the stores and Shopify services they have access to. So you can have multiple stores (one for each franchise in this instance) and be able to navigate between them easily. It might not be exactly what you're looking for, but it might still be able to do what you need.
You can see more about how to migrate to single sign-on and learn more about it from the helpful guide Shopify made about it here.
Hopefully, this helps you in any way shape or form.
All the best, Nick
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