CarPlay will not allow me to hear anyone on the other end of phone calls whether I am sending/receiving the phone call

Hi there Golden8503,

If you are unable to hear the other end of a phone call while connected to CarPlay, follow these troubleshooting steps next since they can resolve unexpected issues like this:

• If you are running any audio apps in the background (third-party navigation, music streaming, etc) stop them before the call and test again.
• Disable Wi-Fi calling in Settings > Phone. 
• Disable Settings > Cellular Data temporarily and test.
• Confirm phone call audio works as expected when not using CarPlay.
• Reset Network Settings. Navigate to Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings.

If this continues to occur after following those steps, then Apple Support would be the best equipped to look into this further. Contact them here: Get Support

Cheers!