Flutter Apps IOS & Android

We would like to build a flutter apps to our business, we need an app for our suppliers to submit for us their products , so we'll keep the supplier profiles and their products for our future orders from them, their catalog should be synced automatically to our magento commerce website. the essentials is that the app is dedicated for suppliers to list their products to our platform with this essential features :
Product Listing Features
Detailed Pre-Order Specifications
Mandatory pre-order information for each product
Min & Max qty per item
Quantity-based delivery timeline tracking
Transparent production and shipping estimates
Quantity Tier Pricing Structure
Price Tiers for ready products Example:
1-10 units: $10/unit
11-50 units: $8/unit
51-100 units: $6/unit
100+ units: $5/unit
Delivery Timeline additional to price per Tier for preorder products:
1-10 units: 10 days delivery
11-50 units: 30 days delivery
51-100 units: 45 days delivery
100+ units: 60 days delivery
Advanced Product Attributes
Detailed weight specifications
Real weight
Volume weight: (Length * Height * Width) / 5000
Minimum and maximum order quantities
Customizable product variations
High-resolution product images
Product Listing Features
Detailed Pre-Order Specifications
Mandatory pre-order information for each product
Min & Max qty per item
Quantity-based delivery timeline tracking
Transparent production and shipping estimates
Quantity Tier Pricing Structure
Price Tiers for ready products Example:
1-10 units: $10/unit
11-50 units: $8/unit
51-100 units: $6/unit
100+ units: $5/unit
Delivery Timeline additional to price per Tier for preorder products:
1-10 units: 10 days delivery
11-50 units: 30 days delivery
51-100 units: 45 days delivery
100+ units: 60 days delivery
Advanced Product Attributes
Detailed weight specifications
Real weight
Volume weight: (Length * Height * Width) / 5000
Minimum and maximum order quantities
Customizable product variations
High-resolution product images
Seller Management
Verified seller profiles
Seller profile information :
Name & Surname
Age
Contact information : mobile phone number
Name of handicraft kind
Years of experience
Legal status: (company, cooperative, traditional craftsman)
Atelier Adrresse (complete adrresse)
Number of workers or assistants
Upload the document proving :
the status ( artisan, cooperative, company)
ID copy of his/her account Manger
bank account information to get paid

Annual subscription model
Performance tracking
Seller rating system
Seller profile edit and modification
Seller account edit and modification
Seller account manager / sub user