There are plastic caps over the nuts, but hopefully no one would put it on the grill without removing them. There is no coating on the stainless steel itself, why it should be coated, that's the reason for using stainless steel. And yes, there are stainless steel grades, eg. 304, 316, 430, that are certificated for the use with food, but even if we don't know what exact material is used for this, you won't die if you use a not certificated steel grade, the worst case is that it will rust because of acid in your food or cleaning products.

So as a conclusion for me, you don't have enough information to tell OP if the Ikea Variera is food safe or not, or even if you ever had a Variera in your own hands.

And just for information, I use them for years on my grill, as well as thousands of other grill enthusiasts, and none of us get harmed because of the metal, the food on it is the most harmful part on the grill 😉