I have my ROOF which carries the skylights on a storey above. I then use this as a trace reference and add the required graphic with 2D elements e.g lines, x-box symbol as required.
Unfortunately I think the only way you can display the skylights dashed automatically is to display the roof on the storey below home which then means you see all the roof outlines which can sometimes be distracting.
I'm sure there will be other options including the use of GO's...
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)