Preheat your oven to 375°F.
In a large mixing bowl, combine the cooked chicken, celery, garlic, and green onions.
Pour the buffalo sauce into the chicken mixture and stir everything until well-coated with the sauce.
Add 1 cup of pepper jack cheese and the blue cheese dressing, mixing thoroughly.
Spread this mixture evenly into a greased 9x13-inch baking dish, creating a uniform layer for even cooking.
Arrange the frozen tater tots on top, covering the chicken layer completely and ensuring they are evenly spread.
Sprinkle the remaining pepper jack cheese over the tater tots.
Bake in the preheated oven for 45-50 minutes, or until the tater tots are crispy and golden brown.
Let it cool for a few minutes before serving.