Mobile app for Grocery store

I am looking for a mobile app developer to create a mobile application for a grocery store. The platform should be both iOS and Android as we need to reach as many users as possible. We do not have an existing back-end system that the app needs to integrate with and we want it to be useful for both grocery store owners and customers.

We need all the below features in app :
Admin panel for Store owner
Payment gateway
Membership plan for users
Copuon offers
Combos offers
Google login - SSO
Add to Cart and wishlist
Address list
Stock management through admin panel
Order cancellation
Notifications
Complaints and feedback
help/support for order

UI/UX similar to below link
https://www.uistore.design/items/online-groceries-free-app-ui-kit-for-figma/