Ah. (sound of penny dropping).
Tasmania.Aus has low levels of iodine in the human diet. It also (post iodine dipping) has low levels of iodine in milk. That suggests that perhaps the cows also have low levels of iodine in their diet.
Just because it’s standard doesn’t mean that there aren’t other techniques.
Fairlife is a product from Coke, part of its developing new markets for those against sugar and soda. It’s big marketing gimmick is that it’s customized milk, milk that’s “healthier.” That seems to be successful for it.
I wrote about it back when it was first introduced.