Heat oil in the instant pot on sauté and add pork, chili powder, cumin, onion powder, garlic powder, salt, and pepper. Brown pork until seared on all sides.
Add the chipotle peppers in adobo sauce, orange juice, and water.
Set instant pot to pressure cook on high for 30 minutes.
Allow to natural release pressure.
Shred meat with two forks.
Spread out a single layer of meat on rimmed baking sheet and broil for 5 minutes (or air fryer at 400) to get the meat slightly crispy.
Serve on corn tortillas with onion, radish, and salsa.