Need minor changes in my ecommerce app - Flutter/Firebase

I already have an app but it lacks some features & you have to add it.
Features to be added in user side:
Home screen (Image banner slider, after that categories scrolling horizontally, after that products to shop)

Admin Panel:
Option to add image banners.
Option to add featured products on home page.
Adding multiple images in single product (Like Amazon, Flipkart)
Changing images from admin panel of already added product.