You can use different types of bread!
In a bowl, mix tuna, Greek yogurt, 1.5T lemon juice, 1T allulose, sweet corn, and pepper.
Place the heated and halved bread on top of magic wrap, and pile all the prepared mixture on one side.
Add shredded onion, shredded cucumber, sliced boiled egg, and halved cherry tomatoes on top.
In a bowl, combine 0.5T wholegrain mustard, 0.5T allulose, and 0.5T mayonnaise to make the sauce. Spread it on the other piece of bread, place on top, and wrap.