https://www.quora.com/What-is-the-difference-between-Food-Service-Industry-and-Restaurant-Industry-VEEBA-IN#:~:text=“Foodservice” is a subset of,entertainment and other large venues.&text=Restaurants fall under the Food,they belong to one family.
“Foodservice” is a subset of “Hospitality” which also includes lodging, convention services, some entertainment and other large venues. Restaurants fall under the Food Services industry which comprises food retail (groceries, convenience stores) and restaurants. So in short, they belong to one family.
restaurant vs food service - Google Search