Provide a search option in the TreeView similar as in the DataGrid. 

When searching on loaded data it will highlight the items(folders, files) like in data grid.

I think filter is a separate feature that to implement together.

Take into account when filtering not to loose the selections that user done and can remove during the filter process from collection view.

Context menu would be useful to allow users to add / delete items.

Provide an option to swipe the TreeView Item. 

I have tried using the Microsoft .NET MAUI SwipeView, but the control cannot scroll.

Provide an API for filtering the TreeView.

Imagine large list of expanded and collapsed items which completely does not fit on the screen in RadTreeView. User scrolls to the middle of the list. User doesn't select anything from the list, just looks. User closes the application, and the application saves TreeView's current scroll positions in some file. Next user opens the application. After items are loaded I want to scroll RadTreeView in code to the position from the previously saved data in file.

This is a feature request to include the Expand(item) and Collapse(item) methods that were available in Xamarin.Forms' TreeView.

This is a feature request to add events for when an item is expanded or when an item is collapsed.

Provide an option to load subitems only when they’re requested - load on demand

Provide an option to define the ItemTemplate on a TreeView Descriptor level. currently, the ItemTemplate is available on TreeView level.