Kezo, at least you can turn off the bongs on the Ioniq 6 apparently, but at the price of loosing your speed sign camera recognition, which will be a miss to me. I like yourself would love to see the AWD Ioniq 6, but it will need to be very soon, for me to change my order for one.
I believe you can but, it reactivates each time you start the car. The other way is to turn the warning/s volume right down.