Preheat the oven to 350°F (175°C).
Heat 1 tablespoon oil in a large skillet over medium heat until shimmering.
Add the chopped chicken to the skillet in a single layer and season with 1/2 teaspoon kosher salt, 1/2 teaspoon black pepper, 1 teaspoon garlic powder, and 1 teaspoon Italian seasoning; cook, stirring often, until the chicken is nearly cooked through.
Remove the skillet from the heat once the chicken is almost done.
Spoon about 1/3 cup of the pasta sauce into the bottom of a 5-quart baking dish and spread evenly.
Layer half of the cooked chicken over the sauce, then half of the pasta, followed by half of the mozzarella and half of the Parmesan; repeat to create a second layer so cheese is on top.
Place the baking dish in the center of the oven and bake until the casserole is bubbling and the cheese is browned, about 25 minutes; check frequently toward the end.
Remove from the oven and let rest for 5 minutes, then serve hot.