FlutterFlow Rebuild & App Store Launch

I already run a small PWA-style app on iOS that I originally built in Thunkable. What I now need is a clean rebuild in FlutterFlow with only two core functions: a WebView wrapper for the existing web content and OneSignal push-notification support... (Budget: $30 - $250 USD, Jobs: App Development, Flutter, FlutterFlow, iOS Development, iPad, iPhone, Mobile App Development, Objective C)