I need to know how the customers will use my app to order food, I have already created and published the app

I have made the app by the name of Desi Spice Bahrain. It is a Restaurant and I want people to order their food from our app.
Can somebody guide me, how customers can order food from Restaurant once they download our app.

I’m not sure what the question is here. Do you mean you created an app but it doesn’t have an order function yet?