Preheat oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Brown ground beef in a skillet over medium-high heat, breaking it up as it cooks (6–8 minutes).
Add diced onion, bell pepper, and chopped pepperoni. Cook until soft and fragrant, about 5–7 minutes.
Stir in garlic; cook 1–2 minutes. Remove from heat. Add 1/3 cup pizza sauce, Italian seasoning, ricotta, 1 cup mozzarella, and crumbled beef bacon. Mix well.
Fill tortillas with the beef mixture, roll tightly, and place seam-side down in the baking dish.
Pour 2 cups of pizza sauce over the top. Sprinkle with 2½ cups mozzarella, more pepperoni, and beef bacon.
Bake 20–25 minutes until bubbly and golden at the edges.
Let sit 5 minutes before serving. Pair with salad or garlic bread.