It is not a problem for the Grid panel to be a destination for the drop operation, but it is a bit tricky to inderstand where the new element should be placed. You cannot easily guess the row/column from the mouse position or at least not in the general case.
Therefore it is a good ida to put something in the cells you want to act as drop targets. I am attaching a small demo.
All the best,
the Telerik team
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