Set instant pot to "saute". Once it reads "hot" add olive oil, ground beef, garlic and salt and pepper. Stir beef until browned and cooked through, about 6 minutes. Drain grease and turn off Instant Pot.
Break spaghetti noodles in half and layer them, over the ground beef, in the Instant Pot in a criss-cross pattern to prevent the noodles from sticking together.
Add in sauce, balsamic vinegar, seasoning, brown sugar, tomatoes, and beef broth.
Close the lid on the Instant Pot, making sure the valve is set to "sealing". Press the "manual" button and set to 7 minutes.
Once the time is up, use the quick release method to release the pressure. Once pressure has finished releasing, allow the pasta to sit for two minutes before serving.