Repurpose industrial robots to have one grabbing manipulator, a video camera, and enough back-end processing to understand barcodes, determine package grappling maneuver, and determine product path to the basket.
Modern industrial robots can be quickly fed a layout of the store, and move to a charging stand when needed. Communicating on Wi-Fi, the robots could be controlled by a central location.
When the need for quarantine is relieved from a location, the robots can be disinfected and move to another location.
What is the need are you focusing on?
Grocery store workers are forced to interact with strangers people all day. They are expected to handle money, and be nice to everyone regardless of their demeanor.
They are at extreme risk.
Shoppers like to view products in person. Online sales have not replaced in-person shopping for these basic human reasons. The desire to view and deliberate over shopping for food products can be accommodated with a live video view. The robot is directed wherever the shopper decides to go, inventory is viewable immediately, and the shopper can be free to think while shopping.
The completed package of groceries could be delivered to a common pickup point at the front of the store.