ScriptReference/DragAndDrop.SceneDropHandler

[giscus[bot]]

ScriptReference/DragAndDrop.SceneDropHandler

https://docs.unity3d.com/ScriptReference/DragAndDrop.SceneDropHandler.html

[vertxxyz]

dropUpon Dragged Game Object that is being dropped into the Scene view.

This is not what's being dropped, it's the object whose surface the drag is being dropped on.
The objects being dropped are DragAndDrop.objectReferences.