Pat pork dry and cut into large chunks so pieces brown well.
Stir paprika, garlic powder, onion powder, cumin, salt, and pepper. Rub over pork.
Set the pot to Saute. Add oil. Brown pork in batches. Move browned pieces to a plate.
Pour in broth and vinegar. Scrape up brown bits with a wooden spoon.
Return pork, onions, garlic, and barbecue sauce to the pot. Stir to coat.
Lock lid. Cook on High Pressure for 60 minutes.
Let pressure release naturally for 10 minutes then quick release.
Transfer pork to a bowl. Shred with two forks. Skim fat from the cooking liquid.
Stir in enough cooking liquid to coat the meat. Add more barbecue sauce to taste.
Serve on toasted buns with slaw or over rice. Spoon extra sauce on top.