This was asked by others in the old iOS forum.
CarPlay support please!
Currently, connecting my iPhone to my CarPlay system, I can get the audio streamed to my car, but the video itself streams to my little tiny iPhone screen. I would like the ability to see the video on the large screen in my car.
I know this is not an easy task:
Apple is very selective in approving CarPlay apps, so it would require the Plex team lots of effort with Apple
Regulations vary by country and streaming video to your car might be forbidden in some countries. But they are certainly workarounds, such as displaying the video on the car screen only when the car is stopped, like they do in Japan with the SatNavs that come with TV (TV is on only when the car is stopped).