public class ViewModel
{
    public ObservableCollection<string> Items { get; } = new();

    public DelegateCommand FilterItems { get; private set; }

    public ViewModel()
    {
        for (var i = 0; i < 100; i++)
        {
            Items.Add($"Item {i}");
        }

        FilterItems = new DelegateCommand(_ =>
        {
            Items.Clear();
            for (var i = 0; i < 10; i++)
            {
                Items.Add($"Filtered Item {i}");
            }
        });
    }
}

<Grid Width="400" Height="400">
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto" />
    <RowDefinition Height="*" />
  </Grid.RowDefinitions>

  <Button Command="{Binding FilterItems}">Filter</Button>

  <ItemsControl
    Grid.Row="1"
    Width="300"
    Height="300"
    ItemsSource="{Binding Items}"
    VirtualizingPanel.IsVirtualizing="True"
    VirtualizingPanel.ScrollUnit="Pixel"
  >
    <ItemsControl.Template>
      <ControlTemplate TargetType="ItemsControl">
        <ScrollViewer
          Background="Transparent"
          CanContentScroll="True"
          Focusable="False"
          HorizontalScrollBarVisibility="Disabled"
        >
          <ItemsPresenter />
        </ScrollViewer>
      </ControlTemplate>
    </ItemsControl.Template>
    <ItemsControl.ItemsPanel>
      <ItemsPanelTemplate>
        <VirtualizingWrapPanel />
      </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>

    <ItemsControl.ItemTemplate>
      <DataTemplate>
        <Border Width="100" Height="100" Margin="10" Background="Red">
          <TextBlock
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Foreground="White"
            Text="{Binding}"
          />
        </Border>
      </DataTemplate>
    </ItemsControl.ItemTemplate>
  </ItemsControl>
</Grid>