I'm guessing that is has to do with this version of iOS having the latest Bluetooth profile. That is why I suggested you contact Nissan and ask them. I've heard that many of car companies are adding the settings for preventing texting. When I have my iPhone connected via Bluetooth to my Mercedes, I cannot use the Mercedes to respond to text messages. While mine is only a 2015, it only has the option to create a text or respond to a received text by using their keyboard, and it is disabled while the car is in Drive and in motion. I had the vehicle software updated earlier this year, and nothing had changed. But when I got iOS 13, I noticed a number of new commands were available in texting, however it would still not allow for responding when driving, at least on the car. I would have to use the actual phone to do it. Something I wouldn't do. But I can dictate through my Apple Watch, will still allows me to watch the road.