Combine Cheeses: In a medium bowl, mix the softened cream cheese and shredded mozzarella together until well blended, about 1-2 minutes of stirring.
Add the Egg and Seasonings: Pour in the beaten egg, then add the salt, black pepper, and garlic powder, stirring until everything is evenly distributed, approximately 1 minute.
Fold in Corn and Chilis: Gently fold the drained corn and finely diced green chilis into the cheese mixture until fully incorporated, being careful not to over-mix, about 30 seconds.
Add Parmesan: Stir in the grated Parmesan cheese until the filling is smooth and creamy, about 30 seconds total.
Prepare Your Pan: Preheat your oven to 375°F and line a large baking sheet with parchment paper or lightly grease it to prevent sticking.
Fill the Chips: Arrange the tortilla chip scoops on the prepared baking sheet, then use a small spoon or piping bag to fill each chip with approximately 1 tablespoon of the cheese mixture, making sure to fill them generously but not overstuffing.
Bake: Place the filled chips in the preheated oven and bake for 12-15 minutes, until the cheese is melted and bubbly and the edges are lightly golden.
Cool and Garnish: Remove from the oven and let cool for 2-3 minutes, then top with fresh cilantro, jalapeños, or bacon bits if desired, and serve warm.