Preheat oven to 375°F and grease a 9x13-inch baking dish. Arrange frozen tater tots in a single layer and bake for 15 minutes.

In a skillet, cook ground beef and onion over medium-high heat for 6-8 minutes. Drain fat, add garlic, and cook for 30 seconds. Stir in taco seasoning, green chiles, and 2 tbsp water. Simmer for 3 minutes.

In a large bowl, mix the meat mixture with enchilada sauce, diced tomatoes, corn, black beans, and cream cheese until smooth.

Spread enchilada mixture over pre-baked tater tots. Top with shredded cheeses. Cover with foil.

Bake for 20 minutes. Remove foil and bake 10 more minutes until cheese is golden and bubbling. Rest for 5 minutes before serving.