Start your Instant Pot with pushing the saute button. Heat the oil , until just smoking and add pork and onions. Saute for about 5 minutes. until browned.
Add chopped garlic and cook for additional 1 minute, stirring. Add wine if using, broth, tomatoes paste, oregano and stewed tomatoes.
Push OFF button and then close the lid, push on STEW button and adjust the time to 25 minutes on high pressure. Quick release. Shred the meat with two forks and stir very well.
Cook your favorite noodles according to the package directions(on stovetop). Serve pork ragu on top of noodles, Enjoy!