I was just in the car, the 18 Chevy. Only CarPlay issue is you must unlock the phone, no matter the if its set to play when locked. 17 Truck has no issues that I have found with CarPlay.
I do use the WHIM that came with the bike and the 20S or 30K head set. It usually connects CarPlay fine if headset is on. However occasionally I have to shut bike down and wait two minutes and try again. Talk to text with siri works, getting directions through siri works, using the iPhone as an iPod works.
The phone will make a call, it will connect but the person your calling can not hear you, and you cant hear them. Same with receiving a call it will connect but you cant hear them and they cant hear you.
Seems the iPhone 11 should work for a call, its the most basic and most important reason for a phone.
That said if not using car play, not in projection mode. The iPhone 11 still cant be used for a phone call, as volume is so low you cant hear them and they cant hear you.
So I am not sure its a CarPlay issue as phone does not work with the boom either way.