https://learn.microsoft.com/en-us/uwp/api/windows.applicationmodel.activation.iactivatedeventargs.splashscreen?view=winrt-28000
IActivatedEventArgs.SplashScreen Property (Windows.ApplicationModel.Activation) - Windows apps |...
Gets the splash screen object that provides information about the transition from the splash screen to the activated app.
splashscreenpropertywindowsactivationapps