Preheat your oven to 375°F (190°C).
Cook the lasagna noodles according to package instructions until al dente. Drain and set aside.
In a mixing bowl, combine the ricotta cheese, garlic powder, Italian seasoning, salt, and pepper. Mix well.
In a large skillet, heat the cooked shredded chicken with half of the Alfredo sauce until warmed through.
Assemble the lasagna in the baking dish: Start with a layer of Alfredo sauce at the bottom.
Place 4 lasagna noodles over the sauce, and spread half of the ricotta mixture over the noodles.
Add half of the chicken mixture on top, followed by a third of the mozzarella cheese.
Repeat these layers: another 4 noodles, the remaining ricotta mixture, the remaining chicken mixture, and another third of the mozzarella cheese.
Top with the last 4 noodles, the remaining Alfredo sauce, remaining mozzarella cheese, and sprinkle with grated Parmesan cheese.
Cover with aluminum foil and bake in the preheated oven for 30 minutes.
Remove the foil and continue baking for an additional 15 minutes or until the cheese is bubbly and golden.
Once done, let the lasagna rest for about 10 minutes before serving. Garnish with fresh parsley if desired.