FDA's November 2020 draft guidance on the use of sesame in foods recommends that manufacturers "clearly declare" its presence on ingredient lists when it is used as part of a flavor or spice. FDA hasn't gone so far as to add sesame  to the "big eight" major allergens list (milk, eggs, fish, crustacean shellfish, tree nuts, wheat, peanuts, and soybeans) for which allergen labels are required. But it seems to be moving in that direction.