Lock Splash Screen orientation in portrait mode

Hello everyone, I'm trying to lock the splash screen of my application in portrait mode both in Android and iOS

In Android, I'm changing the SplashScreen Theme in styles.xml this way but is not working

  <style name="Theme.Splash"
         parent="android:Theme">
    <item name="android:windowBackground">@drawable/briseSplashScreen</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:orientation">vertical</item>
  </style>

For iOS, any insights?