This is currently not available in the RadListView API. You can add this suggestion to the UI for Xamarin Feedback portal
for consideration to be included in a future release. The dev team uses that portal to prioritize issues and feature requests.
If this is must-have feature, you could try adding an up and down arrow buttons in the ItemTemplate that will move that item one position at a time. You'd move it by manually reordering that item in the bound collection. When the ItemsSource has changed, the RadListView will show those changes (as long as you're using an ObservableCollection for the ItemsSource).
Lance | Tech Support Engineer, Sr.
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