In a medium saucepan, combine the heavy cream, chicken broth, garlic powder, and Italian seasoning.
Whisk the mixture over medium-high heat until it begins to simmer and slightly thicken, about 3–4 minutes.
Stir in the grated Parmesan until melted and smooth.
Add the chopped spinach and drained sun-dried tomatoes to the sauce and simmer until the spinach wilts, about 1–2 minutes.
Meanwhile, bring a large pot of salted water to a boil and cook the refrigerated ravioli according to package instructions; drain well.
Toss or spoon the creamy Tuscan sauce over the cooked ravioli and serve immediately.