With ForScan. The option is in the BCM.
I can give you the code I used, but it's only for 2020+ vehicles. For 2019 and earlier it's a different one, which I don't have at hand right now but can be found in the ForScan thread in the DIY section.
No question. Always wear the seatbelt - except backing the car out of the garage to wash it, rolling 1/2 wheel rotation to dress the tires, jockeying cars in the driveway - little things like that when I actually don't want to fool with the seatbelt. I will give it a try.