In a medium bowl, combine the sausage and wine, making sure that all the wine is incorporated. Let sit for 10 minutes.
In the meantime, press Sear/Sauté and adjust the timer to 30 Minutes, and let heat for 2 minutes. Add the olive oil, onion, salt, and black pepper to the cooking pot. Cover with the lid and cook, stirring occasionally, until tender, 8 to 10 minutes.
Add the garlic and cook and stir, uncovered, for 1 minute. Add the sausage and cook, uncovered, breaking it up with a spoon into tiny pieces until no longer pink, about 7 minutes. Press Cancel.
Using a handheld or regular blender, finely chop the tomatoes. Add them to the cooking pot along with the rosemary sprig and stir to combine.
Cover with the lid, press Stew, and adjust the temperature to 175°F (79°C) and the timer to 15 Minutes. Simmer, stirring occasionally, for 10 minutes. Press Cancel.
In the meantime, cook the ravioli according to the package directions.
Remove and discard the rosemary sprig from the cooking pot. Stir in the parsley.
Serve the ragù over the ravioli and sprinkle with Parmesan (if using).