I use Google/Apple Maps for looking up restaurant/business phone numbers for this sort of reason, when I need info or need to order to pickup. And when I do need to order delivery, I still call directly and ask which delivery service they prefer.https://twitter.com/C_O_Lowell/status/1257898044063977473 …
Sometimes, depending on the contract that each restaurant has with each service, the number you find on Google/Apple Maps could be a rerouted number. Best way to check for the number is looking up the restaurant on online yellow pages or business websites.