CarPlay on older Lexus

The apps are entirely on your iPhone. The same apps should work on any CarPlay unit.

Usually there is one app you install on your iPhone that matches the CarPlay manufacturer and provides some specific functionality. In my truck, the FordPass app in CarPlay switches back to the standard Ford Sync infotainment screen. If I remember right, my iPhone suggested that I download and install it the first time I plugged it in.

CarPlay was first introduced in 2014. No vehicle older than that will support it without replacing its audio/infotainment unit with a third party unit that supports CarPlay.