In a medium saucepan, combine 1 cup heavy cream, 1/2 cup chicken broth, 1 teaspoon garlic powder, 1 teaspoon Italian seasoning, and 1/2 cup grated Parmesan.
Whisk constantly over medium-high heat until the sauce begins to thicken, about 3–5 minutes.
Stir in 1 cup chopped spinach and 1/2 cup drained sun-dried tomatoes; reduce heat to medium and simmer until the spinach wilts, about 1–2 minutes.
While the sauce simmers, bring a pot of salted water to a boil and cook 20 ounces refrigerated ravioli according to package instructions; drain well.
Toss the cooked ravioli with the creamy Tuscan sauce until evenly coated, then serve immediately.