Food delivery software is not just for restaurants but any food business. The software is developed in such a way that it is compatible with the pizza ordering system, buying groceries online, food trucks, cakes, liquor, or any on-demand service. It has a website and apps where can customer places an order, a restaurant app where staff accepts the order, and a driver app for the delivery of food.
You can check more details on - https://noshway.com/food-delivery-software-open-source/