I don't know the availabilty in @Debater Slayer 's country, but these days plant milks are pretty well stuffed with vitamins and essential minerals. For example iodine is mostly found in seafood, but it's in the milks that I have.
Yeah, lots of foods are fortified these days. I've always preferred to just get it from my food sources when possible as opposed to being an additive to a food. (which is almost impossible these days. )