I picked up a '22 ZR2 this weekend and I'm on the schedule at my local dealer for this update.
FWIW, a similar update was also called for my Colorado ZR2. It didn't take of first attempt, so the dealership needed to order a cable so the update would successfully complete. I didn't have any issues with the radio or controls in the truck, other than, occasionally, the audio source info wouldn't show on the dash and the forward/back audio controls weren't always working.
In my 1500, I've already noticed that phone call audio will briefly cut-out. I suspect this gateway control module will help address this issue. No other issues identified with my new-to-me truck.