Select sauté to preheat the Instant Pot. When the word “Hot” appears on the display, add the oil. It should thin immediately. Pat the pork shoulder dry with paper towels and season generously with salt and pepper. Sear the pork in the Instant Pot until browned on all sides, about 10 minutes. Add all of the jarred ingredients to the Instant Pot along with the 12 cups of broth. Stir to mix. Cover with the lid and ensure the vent is in the “Sealed” position. Pressure Cook on High for 30 minutes. Allow the steam pressure to release naturally for 15 minutes, then release any remaining pressure manually.