Oh there are a ton of interposer boards you can buy shipped direct from China that add CarPlay to an existing oem head unit the same way you can get reverse cam

Oh there are a ton of interposer boards you can buy shipped direct from China that add CarPlay to an existing oem head unit the same way you can get reverse camera support (high jacking the video output when a certain but is pressed or the gear shift changes). It’s just that they all have massive quirks. I’ve seen the Porsche Classic CarPlay retrofit and it’s absolutely the best, but these third party solutions are available for most makes and models but all have to a of quirks and idiosyncrasies that are never presented up front.