shmagegei
“Ok, well, what about if they just give it to you without any oven use.. I’m pretty sure they just get it off the truck and stick it straight onto those shelves.”
Why are you still ” pretty sure”? Go to the dunkin donuts look and ask around. This isnt complicated stuff. there is no need to make assumptions. none of us know what store you are referring to, where they get their stuff from etc. Go find out it will take an hour tops .
then reports what you find to a knowledgeable person and you’ll get your answer.
There is no need to make random assumptions neither about the how the store operates nor the halacha