Oatmeal

Tahini (you can dip your pita in there)

Beans, canned or dried if you’re able to cook. Lentils also.

Chia seeds - some bags say to refrigerate them but as long as you’re not letting them sit there for a long time you’ll be fine. Same goes for tahini actually.

Nuts and seeds

Could also get other breads or maybe corn tortillas or something

Edit: I suppose by no heating element you mean you can’t cook. So with the oats you’d probably have to get old fashioned oats and do overnight oats or something just using water. Canned beans don’t need to be cooked so you can use those.

Edit 2: ugh I actually don’t know if the overnight oats would work. Everyone I know who makes them uses a fridge. You can eat old fashioned oats “raw” though, since they’re not actually raw but they’ve been steamed. A little weird though. Though you could make a cereal with them or something, like muesli. Actually they sell packaged muesli in the store, that might be a good thing to try, and you could get oats that way. I love getting a box of Alpen.