Few important useful Commands for flutter app release
flutter build ios –release
flutter build apk –release
flutter build appbundle –release
flutter build appbundle –target-platform android-arm,android-arm64,android-x64
flutter build apk –target-platform android-arm,android-arm64,android-x64 –split-per-abi
flutter build apk –split-per-abi
flutter build apk –release –target-platform=android-arm64
flutter build appbundle –release –target-platform=android-arm64