having a datagrid with columns and setting the celleditor style to text column, then setting SelectionOnFocus to some value, then enter the edit mode, for example select all or cursor at start do not apply., always cursor at end applies.

The behavior also happens when using CellEditTemplate and there is RadEntry in it. The SelectionOnFocus does not apply. 

when adding items to the collection bound to the datagrid ItemsSource, the empty template remains visible.

this was working with 11.1.0 version

Having a RadButton in a template/text column cell template and clicking on it, or hovering, at some point the text disappears when using the telerik theming

Workaround: 
Use the RadTemplatedButton: https://www.telerik.com/maui-ui/documentation/controls/templatedbutton/overview 

Provide an option to drag a cell content and drop it to another cell for both default and skia render modes

Makes this feature also available for skia cell renderer

I'd appreciate proper selector for this. I think that's a good addition for DataGrid customization having a style selector for the mouse hover based on the cell value