Preheat your oven to 425°F, or follow the temperature recommended on the tater tot package.
Spread the frozen tater tots in a single layer on a baking sheet. On a separate baking sheet, place a wire rack and arrange the bacon slices in a single layer.
Place both baking sheets in the oven. Bake the tater tots for 20-25 minutes, or until golden and crispy. The bacon will need 12-15 minutes to cook. Start checking it around 12 minutes to prevent overcooking. Once the bacon is crisp, remove it from the oven and let it cool slightly before chopping it into small pieces.
While the tater tots and bacon bake, warm the queso in a microwave-safe bowl or on the stovetop until smooth and pourable.
Thinly slice the scallions and set them aside.
Transfer the baked tater tots to a large serving dish. Drizzle the warm queso evenly over the tater tots. Sprinkle the chopped bacon on top, followed by a drizzle of ranch dressing.
Garnish with the sliced scallions, sprinkle lightly with salt and pepper, and serve immediately while everything is warm.