You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Yes, if you are in the US and if the Model S has the AP3 computer. I think they appear on all Tesla vehicles, in the US, that have the FSD (AP3) computer. You also have to enable the "FSD sneak preview" in the AP settings.