Does setAlternateIconName also changes app icon on Apple Watch companion app/Car play?

I'm extending my app to have an ability to change app icons dynamically. I created a couple of new groups with new icons where I added all available resolutions(iPhones, iPads, watches and car play). But now I'm wondering will the call to setAlternateIconName also change the icon on the companion watch app or in the car play ? Or it only changes the icon on the device itself ? Didn't find this in documentation. Thanks