Maintain the scroll position when updating ItemsSource at runtime

The SfListView have scrolled to top automatically when changing the ItemsSource at runtime. However, you can maintain the same scrolled position by using the ScrollY value of ExtendedScrollView from the VisualContainer. After changing the ItemsSource, you can pass the ScrollY value to ScrollTo method of SfListView and scroll back to the same position.

For horizontal orientation, use the ScrollX value of ExtendedScrollView.

By using Reflection, get the value of ScrollOwner from VisualContainer and use it.

using Syncfusion.ListView.XForms.Control.Helpers;
public partial class MainPage : ContentPage
{
    ExtendedScrollView scrollView;

    public MainPage()
    {
        InitializeComponent();
        scrollView = listView.GetScrollView();
    }

    private void ChangeItemsSource_Clicked(object sender, EventArgs e)
    {
        var viewModel = new ContactsViewModel();
        listView.ItemsSource = viewModel.EmployeeInfo;
        listView.ScrollTo(scrollView.ScrollY);
    }
}

To know more about Scrolling in ListView, please refer our documentation here