Like Gadol Hador said “if you have 2 wraps then it becomes hamotzi with Benching full birchas hamazon after” this is all due to being Kovea Seuda which means that the amount of wraps enough to be considered a full meal so the bracha changes from eating just 1 wrap of melons to 2 or more of making hamotzi followed by full birchas hamazon after.
Which is the same reason why 2 full chocolate or cinnamon etc….. danishes also require hamotzi and full birchas hamazon after. Versus just one danishes is just a mezonos.
Ask your LOR for more explanations if this isn’t enough to know the difference when it changes from mezonos to hamotzi with full birchas hamazon after.