In a large pot of boiling salted water, cook the lasagna noodles according to package instructions until al dente. Drain and lay the noodles flat on a clean kitchen towel or parchment paper to cool slightly.
In a mixing bowl, combine the shredded chicken, ricotta cheese, half of the mozzarella cheese, garlic powder, Italian seasoning, salt, and pepper. Mix until fully combined.
Spread a thin layer of the Alfredo sauce on the bottom of a 9x13 inch baking dish. Working with one noodle at a time, spoon about 2-3 tablespoons of the chicken mixture onto the noodle and roll it up tightly. Place the roll seam-side down in the baking dish. Repeat with all the noodles.
Once all the roll-ups are in the baking dish, pour the remaining Alfredo sauce over the top and sprinkle with the remaining mozzarella and Parmesan cheese.
Cover the baking dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden.
Remove from the oven and let cool for a few minutes. Garnish with freshly chopped parsley before serving.