Preheat Instant Pot, set to "saute".
Add olive oil to the inner pot of Instant Pot.
Add cubed chuck roast, working in batches. Brown evenly on all sides. Set aside browned beef cubes.
Crumble Italian sausage, and add to Instant pot, along with diced onion and carrots. Saute until sausage is lightly browned, breaking up larger pieces as needed.
Return cubed chuck roast to pot.
Add tomato paste and saute until evenly distributed
Carefully pour in red wine and stir
Pour in beef broth, crushed tomatoes, italian seasoning, salt, and pepper.
Switch setting to "pressure cook" and "high", and set timer to 40 minutes.
When timer for ragout is completed, allow a natural release for 10-15 minutes.
While Instant Pot is naturally releasing pressure, prepare the pasta according to package directions. Drain and set aside.
Loosely cover vent openings with some paper towels. Manually release remaining pressure, carefully, to avoid potential steam burns, and hot liquid splatter.
Shred chunks of beef with a fork. Stir sauce and spoon over pasta.