messenger app notifications on car play

Hi CarPlay760,

Thanks for connecting with us here in Apple Support Communities. You should receive your notifications for Messages unless you have the Driver Focus enabled. You can see more about this here: Change settings in CarPlay

Use the Driving Focus with CarPlay

The Driving Focus helps you stay focused on the road. While your iPhone is connected to CarPlay and Driving Focus is on, notifications and text messages are silenced or limited.

1. Open Settings in CarPlay using your vehicle’s built-in controls.

Note: If you’re viewing CarPlay Dashboard and Settings doesn’t appear in the recent apps list on the left, tap  to see pages of all of your CarPlay apps, including Settings.

2. Go to Driving Focus, then select Activate With CarPlay.

If you receive a Driving Focus notification when you’re not driving (for example, when you’re a passenger) you can turn it off—tap the notification, then tap “I’m not driving.”

This should help to answer the question you have about notifications.

Kind regards.