AppDelegateOrMainActivity.cs

// For iOS in the AppDelegate.cs
public override bool FinishedLaunching(UIApplication uiApplication, NSDictionary launchOptions)
{
  global::Xamarin.Forms.Forms.SetFlags("SwipeView_Experimental", "CarouselView_Experimental");
  Forms.Init();
  
  // The rest of the code...
}

// For Android in the MainActivity.cs
protected override void OnCreate(Bundle bundle)
{
  global::Xamarin.Forms.Forms.SetFlags("SwipeView_Experimental", "CarouselView_Experimental");
  Forms.Init();
}