My app is not showing in app store.

My app is not showing on iPhone lower than version 13 on Appstore. iPhone with version 13 shows the app availability on App Store.

This is my development report. Minimum deployment version is 11 on Xcode.

[✓] Flutter (Channel stable, 2.8.1, on macOS 12.1 21C52 darwin-x64, locale
    en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[✓] VS Code (version 1.63.2)
[✓] Connected device (1 available)