Cook pasta according to package directions. Reserve 1/2 cup pasta water before draining.
Season chicken pieces with Italian seasoning, onion powder, salt, and pepper. Heat olive oil and 1 tbsp butter in a large skillet over medium-high heat. Cook chicken until golden and cooked through, about 6-7 minutes. Remove to a plate.
Melt remaining butter in the same skillet over medium heat. Add garlic and cook 1-2 minutes until fragrant.
Pour in chicken broth and heavy cream. Bring to a simmer and cook 4-5 minutes until slightly thickened.
Add pasta to the skillet and toss to coat. Return chicken to the pan. Add pasta water as needed.
Remove from heat, stir in Parmesan, and top with fresh parsley before serving.