Preheat your grill or grill to medium-high heat. Lightly brush the corn with oil and grill for 8-10 minutes, turning occasionally, until tender and lightly charred on all sides. Allow it to cool slightly, then cut the kernels off the cob.
Add the grilled corn kernels, cream cheese, soy sauce, granulated garlic, sugar, jalapeño, scallions, and mozzarella cheese to a large bowl. Mix until well combined.
Place a wonton wrapper on a clean work surface and add about 1 tablespoon of filling to the center. Lightly wet the edges with water, then fold and press firmly to seal. Repeat with the remaining wrappers and filling.
Working in batches, fry the rangoons for 1-2 minutes, turning as needed, until golden brown and crispy. Avoid overcrowding the pan.
Remove with a slotted spoon and transfer to a paper towel-lined plate to drain any excess oil.
Serve with sweet chili sauce, if desired, and enjoy!