The U.S. NHTSA takes a more cooperative approach with industry. Safety features are a critical driver of the model upgrade cycle, so it's in the industry's interest to roll these out. The NHTSA negotiates with the industry on timelines for when mandatory requirements begin, but these hard deadlines lag years behind when these features become ubiquitous voluntarily. Timelines for voluntary rollout are part of the negotiating process, so just because the legal deadline is 2029 doesn't mean NHTSA didn't negotiate for features to be included earlier. This results in less acrimony so industry is less inclined to complain to Congress.
Meanwhile, the actual people affected (drivers/pedestrians) don't exactly have much of a say in the US either.
Or at least it did a few years ago when the car was insured and on the road.
1: https://www.caranddriver.com/car-insurance/a36331753/are-suv...