The content inside the swipe template is missing when using MAUI 9.0.40 and Telerik MAUI 10.0.0
Workaround:
Use MAUI 9.0.30 and Telerik MAUI 10.0.0
1. Bind the CheckedItems collection of the TreeView to the CollectionView ItemsSource.
2. there aren't any items in the TreeView initially. Add items to it
3. Start checking the checkboxes
4. The items are added to the CollectionView, still they are not visible in the control.