use Get element to find an “anchor” point.
Inside it, add Move Mouse, and adjust x,y to place the mouse where you want to start dragging from.
Then add another Move Mouse and set X,Y relative from the same anchor point, were you want t move the mouse to, and enable “animate mouse”
If you don’t know the location to move the mouse to at run time, you can also add a second get element under the first get element, and use the second Move Mouse from inside that.