Online shopping application

I need an application (Android & IOS ) for online shopping( credit card, wallet or cash on delivery) with an administrator panel to add or delete items and to check the stock add, modify stock retrieve items, insert the expenses and check the total benefit, dashboard in home screen and finally point system for the customers ( earn points for each item that the customer buy )
and the more important thing in the application, it should be done using Flutter + MS SQL + C#