Iodized salt has less appeal as a flavoring agent, so more stores tend to stock sea salt or other kosher salt that doesn't have as many additives and a better flavor.
You can still find it. If you're willing to add to Bezos' dragon hoard, you can get a 25 pound bag of it for $46, and I'm sure you can find it for a bit more if you can find a direct distributor other than the Bezos hoard.
Iodized salt has less appeal as a flavoring agent, so more stores tend to stock sea salt or other kosher salt that doesn't have as many additives and a better flavor.
You can still find it. If you're willing to add to Bezos' dragon hoard, you can get a 25 pound bag of it for $46, and I'm sure you can find it for a bit more if you can find a direct distributor other than the Bezos hoard.