Drag and Drop an Object that is not registered in the Object Repository

I was able to click an object in canvas in the previous topic with WebUI.clickOffset.

Because I clicked object as coordinate, this object is not in the object repository. In this case, is the drag-and-drop API in Katalon Studio unavailable?

I checked two drag and drop APIs provided by Katalon Studio.

WebUI.dragAndDropToObject(sourceObject, destinationObject)

If I have to know what I clicked object to use drag and drop, is there any way to track the object in canvas?

The objects in canvas do not seem to have HTML elements.