Couldn't change the ListViewHeader size from ElementCompositionPreview

Question

I expect when user scrolls the ListView, it will reduce the ListViewHeader' height. I have already tried this code, it didn't change anything.

List.xaml:

 <ListView x:Name="ListMain" ... >
        <ListView.Header>
            <Grid x:Name="ListHeader" ... >
                 <!-- some layouts here -->
            </Grid>
       <ListView.Header>
 </ListView>

List.cs:

    Border border = (Border)VisualTreeHelper.GetChild(ListMain, 0);
    ScrollViewer scrollViewer = (ScrollViewer)border.Child;

    var scrollViewerManipulationPropSet = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(scrollViewer);
    var scrollPropSet = scrollViewerManipulationPropSet.GetSpecializedReference<ManipulationPropertySetReferenceNode>();

    var offsetExpression = -scrollPropSet.Translation.Y + 30;
    var sizeExpression = ExpressionFunctions.Clamp(scrollPropSet.Translation.Y, 100, 350);
    
    var targetElement = ElementCompositionPreview.GetElementVisual(ListHeader);
    targetElement.StartAnimation("Offset.Y", offsetExpression);
    targetElement.StartAnimation("Size.Y", sizeExpression);

Is there something missing here? I couldn't find some clues on Microsoft's documentation.