https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.media.animation.storyboard.settargetproperty?view=windows-app-sdk-2.0
Storyboard.SetTargetProperty(Timeline, String) Method (Microsoft.UI.Xaml.Media.Animation) - Windows...
Sets the value of the Storyboard.TargetProperty XAML attached property for a target element.
media animationstoryboardtimelinestringmethod