Fill a large pot with salted water and bring it to a boil. Cook the lasagna noodles according to the package instructions until al dente. Drain and lay them flat on a clean surface or parchment paper to prevent sticking. Avoid overcooking as soft noodles may tear during rolling.
While the noodles are cooling, heat the olive oil in a skillet over medium heat. Add the shredded cooked chicken just to warm it up—about 2–3 minutes. In a separate mixing bowl, combine the Alfredo sauce, ricotta cheese, Parmesan, chopped parsley, garlic powder, salt, and black pepper. Mix until everything is smooth and evenly blended.
Take each noodle and spread about 2 tablespoons of the Alfredo mixture across its surface. Spoon a small amount of chicken over the sauce. Gently roll the noodle from one end to the other, keeping the filling inside. Repeat with all noodles until all are filled and rolled.
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish. Place each roll seam-side down into the dish. Pour the remaining Alfredo sauce evenly over all the roll ups. Sprinkle the shredded mozzarella cheese on top. Bake uncovered for 20–25 minutes or until the cheese is melted, bubbly, and lightly golden on top.
Once out of the oven, let the roll ups rest for about 5 minutes before serving. Garnish with extra parsley if desired. Pair it with garlic bread or a fresh green salad for a complete meal. Leftovers can be stored in an airtight container for up to 3 days in the refrigerator.