In a small bowl combine the Spice Mixture ingredients and use to season both sides of the pork chops.
Add olive oil to the Instant Pot. Using the display panel select the SAUTÉ function.
When oil gets hot, brown the meat on both sides, 3-4 minutes per side. Meat will not be cooked through. Do not crowd the pot--you may have to work in batches. Transfer browned meat to a shallow dish and cover loosely with foil.
Add broth to the pot and deglaze by using a wooden spoon to scrape the brown bits from the bottom of the pot.
Put the meat back into to the pot.
Turn the pot off by selecting CANCEL , then secure the lid, making sure the vent is closed.
Using the display panel select the MANUAL or PRESSURE COOK function*. Use the +/- keys and program the Instant Pot for 7 minutes and adjust to LOW PRESSURE.
When the time is up, let the pressure naturally release for 10 minutes, then quick-release the remaining pressure.
Remove the pork chops to a foil-lined baking sheet and brush with bbq sauce. Set the pan under the broiler until meat is caramelized and bubbly, 3-4 minutes. Serve immediately.