I feel your confusion, especially when the manual says one thing, but reality is another. I recently had a similar situation. So, I know how you feel. It's funny how even your wife's Cayenne is chiming in on the message action while your PCM remains silent. It's like your car is in its own little world! By the way, have you ever thought about giving a free US number a shot? These things can sometimes work wonders when it comes to solving tech-related mysteries. I've tried it, and it worked for me. So, it might be worth considering!
Sure, I do. Every time I need to get a verification code, but you know what? I always receive SMS online, since I use a temporary number for verification purposes