To make this in the Instant Pot, follow Step 1 below and brown the meat in the pot on the Sauté setting. Turn it off and add the chopped onion, apple cider vinegar, chicken broth and bbq sauce. Top with the lid, set the valve to seal and cook on high pressure for 45 minutes. Allow the pressure to come down naturally for 10 minutes then move the valve to release the remaining pressure. Shred the pork and serve.