I haven’t had a chance to look at your GH file but you can use the Technical Display Mode in Rhino 8 which will show hidden lines beyond as dashed.
It supports vector printing as well.
Alternatively, Make2D
Alternatively again, if you know which lines are supposed to be “hidden” set those as a hidden linetype in R8 with the new Model Linetype components.
For R7 you could also use Human plugin or a Python, or C# script.
Not sure I understood if you’re trying to simulate what Make2D does, which means you could simply use Make2D within GH as suggested by @michaelvollrath ?
Alternatively, you can also use the Dash Pattern (Dash) on the curves you know are below:
Note: you can choose your own gap lengths - I did it the way it is just as an example.
Note 2: I don’t think the Dash component is supposed to take that long (1.9s) in this case - I use it often - my computer must have been lethargic temporarily.