The Retail Store object is not in the Enhanced Consumer Goods model, it's a Base Consumer Goods model object that is still in the package. Best practice is to utilise Account object as it is the data referenced by the modeler.
You are correct, the Retail Store object is part of the Base Consumer Goods model within the package. Best practice suggests using the Account object for better consistency and integration.
Thank you for your interest! We appreciate your suggestion. We'll certainly consider creating more content specifically focused on Salesforce Consumer Goods Cloud in our future videos. Stay tuned for updates!