App created needs to be App Store readied

I am looking for an experienced iOS developer to finish and prepare an existing collectible-tracking app called “Squish Stash & Wish” for release in the Apple App Store. This is not a from-scratch concept. I already have a functional app/prototype created with ChatGPT, including the design, branding, product catalog, navigation, and many working features. Family members are currently testing it. I need a developer to review what has been built, determine what can be reused, and convert or package it into a reliable iPhone app using Xcode. The app helps fans track their NeeDoh and other squishy collectibles. Users can browse products and mark each item as “I Own” or add it to a wish list. Important features include: • Existing catalog of more than 90 collectible products • Search, filters, categories, and product images • “I Own” collection tracking • Wish-list tracking • Camera barcode scanning that identifies a product and allows it to be added to the user’s collection • Importing and updating product and barcode lists • Amazon and eBay buttons using affiliate links • Local data storage and/or appropriate cloud database recommendations • Possible future in-app purchases or premium features • App icon, launch screen, privacy disclosures, and App Store requirements The developer’s responsibilities would include: 1. Review my existing app, code, files, and assets. 2. Explain what can be reused and what must be rebuilt. 3. Create a stable iOS version in Xcode, preferably using Swift and SwiftUI. 4. Complete the barcode scanner and collection-data features. 5. Test the app on current iPhones and correct bugs. 6. Help configure Apple Developer and App Store Connect requirements. 7. Prepare and submit a TestFlight build for family testing. 8. Make necessary corrections and prepare the final App Store submission. 9. Provide me with the complete source code, Xcode project, documentation, and full ownership of the completed work. Please do not propose rebuilding the entire project until you have reviewed what is already completed. I would like the project divided into milestones, beginning with a paid technical review and written assessment. When responding, please include: • Examples of iOS apps you have published • Experience with Swift, SwiftUI, Xcode, barcode scanning, databases, affiliate links, and App Store submission • Your estimated price for the initial technical review • Your estimated total cost and timeframe • Whether you will assist through TestFlight and final App Store approval Clear communication is important. I am looking for someone who can explain technical matters in plain language and provide regular progress updates.