A year or 2 ago I built a website for a restaurant. It was a simple site : a menu, and ordering system. Once I finished up I chatted with a number of restaurant owners, thinking I might be able to pick up some more businesses and leverage my research.
I found that other than Chinese and Pizza shops, most restaurateurs didn’t want to be in the delivery business and were happy to outsource that to a delivery firm (ubereats, grubhub, etc). When I was speaking with them, I found out that they: didn’t want to take on the risk of the drivers (accidents, etc), nor manage the drivers. Most were concerned about the additional insurance costs. They also felt the additional marketing help they got by being on these platforms were worth it.