Listview Not binding through ViewModel

I have my viewmodel a below -

public class LeadershipViewModel
{
private PfsServiceArea _oldProduct;
public ObservableCollection Products { get; set; }
public LeadershipViewModel()
{
Products = new ObservableCollection();
var PFSArea = new PfsServices().GetPFSServiceArea("Leadership");
if (PFSArea.Count > 0){
foreach(PfsServiceArea pf in PFSArea){
Products.Add(pf);
}
}
}

    public void ShowOrHidePoducts(PfsServiceArea product)
    {
        if (_oldProduct == product)
        {
            // click twice on the same item will hide it
            product.ShowDescription = false;
            product.ShowDisplay = true;
            UpdateProducts(product);
        }
        else
        {
            if (_oldProduct != null)
            {
                // hide previous selected item
                product.ShowDescription = true;
                product.ShowDisplay = false;
                UpdateProducts(_oldProduct);
            }
            // show selected item
            product.ShowDescription = true;
            product.ShowDisplay = false;
            UpdateProducts(product);
        }

        _oldProduct = product;
    }

    private void UpdateProducts(PfsServiceArea product)
    {
        var index = Products.IndexOf(product);
        Products.Remove(product);
        Products.Insert(index, product);
    }

And I have binded it with listview like below -
Private LeadershipViewModel leader = new LeadershipViewModel();
sicCodeList = new CustomListview(ListViewCachingStrategy.RetainElement)
{
HorizontalOptions = LayoutOptions.StartAndExpand,
VerticalOptions = LayoutOptions.EndAndExpand,
ItemTemplate = sicDataTemplate,
SeparatorVisibility = SeparatorVisibility.None,
Margin = new Thickness(-5, 0, 0, 0),
BindingContext = leader

        };
        sicCodeList.HasUnevenRows = true;
        //sicCodeList.BindingContext = leader;
        sicCodeList.SetBinding(ListView.ItemsSourceProperty, "Products");
        sicCodeList.ItemTapped += (sender, e) => OnItemTapped(sender, e);

I can see 4 items in leader but they are not visible in the listview. Can someone tell me why is this?