Web App Migration: Base44 to React Native

Need a Web App designed for mobile, removed from Base44 to React Native. I created a mobile app using Base44 and is currently hosted in Base44, with storage in S3, Lambda in AWS, but want to get it to be full mobile app to be on App Stores... (Budget: $1500 - $3000 USD, Jobs: API Development, App Design, App Development, App Store Optimization, Base44, Frontend Development, Mobile App Development, Mobile Development, React Native, Web Development)