Well all the ones I looked at, be in MB, Caddy, Acura and a few others you could get some things as a one off, say a sunroof but you had to take certain trims and even other options, but if you wanted the Heads Up Display, it only came as part of the tech pack.
The higher end stuff, Porsche, higher end MB, higher end BMW and a couple of others it could be done. But at that point you are looking at close to $100k and no I'm not spending that much.
Even Hyundai, if I want to just get another Ioniq5 and get one with the HUD I need to get the limited trim, which yet again comes with a ton of crap I don't need or want.
In the end, it is what it is, just I remember "back in the day" getting a cheap ass Dodge Shadow off the lot because I needed a car NOW. Had I been able to wait a month or so I could have had Dodge spit one out of the factory equipped with only what I wanted.
Just needed to rant.
Oh, and nothing to do with anything else, and about $100k over my price range for the top end model. Yes it's cool.
But really:
https://www.youtube.com/watch?v=m0FiOmJ3iqA-Dave