How to detect scrolling direction in .NET MAUI ListView(SfListView)?

<listView:SfListView x:Name="listView" ItemsSource="{Binding BookInfo}" ItemSize="120" IsStickyHeader="True">
       
    <listView:SfListView.Behaviors>
        <local:Behavior/>
    </listView:SfListView.Behaviors>
        
    <listView:SfListView.HeaderTemplate>
        <DataTemplate>
            <StackLayout BackgroundColor="LightGray">
                <Label Text="{Binding Path=BindingContext.ScrollDirection, Source={x:Reference listView}}" FontAttributes="Bold" HorizontalOptions="FillAndExpand" HorizontalTextAlignment="Center" VerticalOptions="FillAndExpand" VerticalTextAlignment="Center"/>
            </StackLayout>
        </DataTemplate>
    </listView:SfListView.HeaderTemplate>
</listView:SfListView>

public class Behavior : Behavior<SfListView>
{
    ListViewScrollView scrollview;
    double previousOffset;
    public SfListView listView;
    BooksViewModel viewModel;
 
    protected override void OnAttachedTo(SfListView bindable)
    {
        listView = bindable as SfListView;
        viewModel = new BooksViewModel();
        listView.BindingContext = viewModel;
        scrollview = listView.GetScrollView();
        scrollview.Scrolled += Scrollview_Scrolled;
        base.OnAttachedTo(bindable);
    }
 
    private void Scrollview_Scrolled(object sender, ScrolledEventArgs e)
    {
        if (e.ScrollY == 0)
            return;
 
        if (previousOffset >= e.ScrollY)
        {
            // Up direction  
            viewModel.ScrollDirection = "Up Direction";
        }
        else
        {
            //Down direction 
            viewModel.ScrollDirection = "Down Direction";
        }
 
        previousOffset = e.ScrollY;
    }
}