Set Instant Pot to saute, add pork butt and brown on all sides.
Remove pork butt and set aside. Add olive oil, onions and garlic and saute until translucent, about 7 min.
In a small bowl, combine hatch green chilis, lime juice, and all spices.
Return pork to Instant Pot and pour the chili mixture on top.
Set your Instant Pot to meat/ stew, or 45 minutes on manual.
Remove pork from Instant Pot and shred using two forks.
Lay shredded pork onto a sheet pan and cover with the sauce from the Instant Pot.
Place sheet pan into oven and broil under high for 3 to 5 minutes until you begin to see brown, crispy bits.
Garnish with avocado, cilantro, radish and limes and serve in a warm taco shell.