edit: I did some research. Ghost kitchens are generally inspected by federal or state authorities, but laws for inspection vary widely by state, and it can be difficult for customers to see or understand inspection results. E.g. You go to a restaurant and see the health grade in the window, but when you order from an online vendor who shares the same kitchen with 5 other vendors, it's very hard to trace the food your getting to the kitchen it's being prepared in and the relevant inspection history.