Set the Instant Pot® to Sauté mode, and heat the oil for about 1 minute. Add the red onion, garlic, and ginger and sauté for about 2 minutes. Stir in the ground spice mixture and vinegar. Add the ribs and cook, stirring, until the ribs are coated and the mixture is a rich reddish-brown color, about 3 minutes. Add the chicken or vegetable broth and brown sugar and stir well. Bring the mixture to a simmer.