It usually depends on the size of the company producing the food. It’s different from place to place but there is usually an exception in food labeling laws for very small business. So if less than X is sold, if the companies revenues surpass Y, or if anything is sold across state lines it needs a nutritional label. Otherwise they’re exempt. Doesn’t mean that the specific seller in the photo isn’t breaking the law but like everything it’s a lot more nuanced than just everything needs a label.