I'm in the same boat-- I just had the fix installed yesterday and while the steering feels better, I have a 2020 EcoDiesel and I swear that FCA and the dealerships are like "huhhh?" on all things diesel. Hoping that it is not a safety issue in the future.
I have had the replacement box on the diesel for a couple months now with no problems. I did contact my dealer and they confirmed the replacement box is not a safety issue. Dealer also said when the correct box is available they will contact me and install it.
I think the only difference between boxes is 14:1 vs 15:1. Maybe someone can confirm?