Bring a large pot of salted water to a boil and cook the frozen ravioli according to package instructions; reserve 1/2 cup of the pasta cooking water, then drain and set ravioli aside.
Heat the olive oil in a large 12" skillet over medium-high heat.
Add the bite-size chicken pieces to the skillet and season with salt, pepper, garlic powder, Italian seasoning, and red pepper flakes.
Cook the chicken, stirring occasionally, until browned and cooked through, about 5–7 minutes.
Add the minced garlic, chopped sun-dried tomatoes, chopped green onions, and chopped parsley; cook and stir for about 2 minutes until fragrant.
Pour in the heavy cream and chicken broth, then simmer the sauce for 2–3 minutes to combine flavors and slightly thicken.
Gently add the cooked ravioli and the grated Parmesan to the skillet; toss carefully to coat the ravioli in the creamy sauce.
If the sauce is too thick, thin with some reserved pasta water until desired consistency is reached, then serve warm with extra Parmesan if desired.