Ocado in the UK did more or less this. They started out partnering with a large supermarket chain and then started building out their own automated warehouses.

Ocado in the UK did more or less this. They started out partnering with a large supermarket chain and then started building out their own automated warehouses. The big chains all offer online ordering and delivery, at times with scale that makes it worthwhile for them to run dark stores which are closed to the public and only fulfil online orders. At the other end of the spectrum there are companies like the one I work for offering online ordering and delivery services to smaller independent shops, we provide the website and logistics and they use existing shop staff to pack orders when the shop is quiet.