Preheat the oven to 350°F (175°C). In a large skillet over medium-high heat, cook the ground beef until browned and crumbly, about 7–10 minutes. Drain excess grease. Stir in the cream of mushroom soup, salt, and black pepper. Transfer the beef mixture into a 9×13-inch baking dish and spread it evenly. Arrange the frozen tater tots in an even layer over the beef. Top with shredded cheddar cheese. Bake uncovered for 30 to 45 minutes, or until the tater tots are golden and crispy, and the cheese is bubbling. Let rest for 5 minutes before serving.