I don't know about the tool in question, but there must be a parameter of the model to choose, with an empty background (without border, note, cartridge... Etc) the drawing will not appear in a dxf.
It's not possible in the export options for my part I do it via macro, which also hides the milling circle and exports to the same place as the MEP with the same name. On the other hand, I only do it on the 1st sheet because for us a sheet metal = a part = a MEP