Just a thought, the last time iodine became a problem was when it was added to salt and bread. The Gov issued warnings everywhere and essentially eradicated the problem. I’m positive if lack of iodine became a problem again they would issue warning everywhere.
Be careful of the internet and it’s medical wisdom. It is possible the doctors have been seeing some signs of iodine deficiency but I’m certain we are not epidemic and for the most part we get enough.