Cook your tator tots in your air fryer at 380 for 7-10 minutes or bake them in the oven according to package directions.
While tator tots are cooking, make your queso. Place your Velveeta and ro-tel in a large microwave safe bowl. Microwave for 2 minutes; stir and continue microwaving in 1 minute increments, stirring in between, until smooth.
Layer tater tots on one large serving platter or 4 individual plates. Top with warmed pot roast.
Drizzle queso over roast and tater tots. Top with sour cream, avocado and jalapeno slices. Add any additional toppings and serve!