Please donot compare a application under 100 dollars like Foodomaa to a billion dollar startup like Swiggy/Zomato.
The thing you are looking for, even if we build that, Foodomaa customers won't be able to afford the pricing that Google will charge for that kind of API usage.
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In the Foodomaa delivery application, there is already a button to get the direction of restaurant and customer. (When clicked goes to Google Maps Application and passes the data)