Flutter App Dual-Store Launch

I have a production-ready Flutter application whose backend runs on Laravel (PHP 8, MySQL 8). The code is already stable; what I need now is a smooth, end-to-end release to both the Apple App Store and Google Play Store... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Android App Development, App Development, Flutter, iOS Development, Laravel, MySQL, PHP)