Thanks a lot, your method also solved my problem with Touch drag and drop.
For anyone who needs Pointer’s position for tracing on Drag & Drop with Touch:
Create a custom Drag & Drop Operation → Override function → Dragged
Create Event Dispatcher, return type vector 2D then connect Event Dragged with that Event Dispatcher
Go back to your widget that has drag & drop function → Create new event has return type 2D Vector → Create a new variable to store this pointer position
Lastly, “On Drag Detected” create your custom Drag & Drop Operator, then bind its Event Dispatcher to the Event created in the previous step.
Hope this help!