Mobile Quick-Commerce App (React Native or Flutter)

I need a minimum-budget cross-platform mobile app (Android + iOS) built in React Native or Flutter.
The backend APIs and database are already developed — I only need the frontend mobile application.

App Scope

A simple quick-commerce app (like Blinkit/Zepto).

Customer App: Register, login, browse products, filter/sort, add to cart, place orders, and track order status in real time.

Admin App: Login, manage products (add/update/delete), and update order statuses (Placed → Processing → Dispatched → Delivered), with changes reflected instantly for customers.

Features

User registration & login

Product listing with filters/sorting

Cart & checkout flow

My Orders (with live status updates + push notifications via Firebase)

Admin product & order management

Requirements

Cross-platform (Android + iOS) app using React Native or Flutter

Authentication for both customers and admins

Real-time order tracking updates

Push notifications for status updates

Deliverables

Complete source code of the frontend app

Clear project folder structure

Setup instructions for running locally and connecting with APIs

This is a budget-conscious project, so please propose the simplest and most efficient approach.