Begin by mixing the dry seasonings and brown sugar in a small bowl.
Cut the pork into 3 or 4 pieces, depending on the size, and trim any large pieces of fat then season it well on all sides with the seasoning blend.
Turn the instant pot on sauté and add the olive oil. When the oil is hot add the pork and sear it for a couple minutes per side until it begins to brown.
Remove the pork from the pot and press cancel. Add the chicken broth and use a wooden spoon to scrape any bits off the bottom of the pot, then return the pork to the pot.
Add the onions, garlic, and apple juice, then close the lid, turn the valve to seal, and set the pressure to high for 70 minutes.
When the timer is complete allows the pot to naturally release for 10 minutes then turn the valve to release the remaining pressure. When the pin drops, carefully remove the lid.
Remove the pork from the pot and place it in a bowl. Shred the pork with two forks and then use as desired.
Notes
The time to reach pressure will vary depending on the make and model of your pot.