I have this option on our 2018 S, and I don't believe there is any cosmetic difference, vs. Macans without it. Or maybe I just never noticed it, when going to the dealership occasionally and looking at other Macans.
If you're in the Albany, NY, area, you're welcome to take a look. (You might want to add something about your location to your signature block. Oh, and welcome to the forum!)
PS: My wife and I ordered our S without a sun roof, so no comment there. And I can't help myself here -- go ahead and yell at me -- I don't think there's any effect vis-a-vis a toll transponder (and the cell phone is too hard to tell, because we hardly ever drive our backup car anymore).
PPS: The glass is a fairly rare and certainly not cheap option, and has nothing to do with performance, and doesn't make the car look any better. Given all that, it doesn't surprise me that there are few, if any, lot cars with that option. Not a really a big selling point for most people, so the dealers would be stuck with having to charge a customer a grand more for that car. Similarly, we ordered our car with full saddle brown leather interior -- which was three+ grand, but at least it makes the inside look a lot better (IMHO) -- and I don't think you'll find many lot cars with a full-leather option, either.