How show items count of ListView in Footer?
You can show items count in footer of ListView by directly binding the count property of ItemsSource bind with ListView.
<listView:SfListView.FooterTemplate>
<DataTemplate>
<StackLayout Orientation="Horizontal">
<Label Text="Items Count" />
<Label Text="{Binding Items.Count}"/>
</StackLayout>
</DataTemplate>
</listView:SfListView.FooterTemplate>