YouTube not showing in apple car play screen. How to get?

Hi hirantha77,

Thank you for using the Apple Support Communities! As noted in the following article "CarPlay works with select third-party apps that you download to your iPhone. Compatible apps—including audio, navigation, messaging, and voice-calling apps, and apps made by your vehicle manufacturer—show up automatically on CarPlay Home and can be controlled with Siri. For example, you can ask Siri to give you directions from your favorite navigation app. CarPlay also works with additional third-party apps for EV charging, parking, and quick food ordering.":

Use other apps with CarPlay

Hope this helps!

Have a great day.