Set the Instant Pot to Sauté and adjust to More or High. Heat the manteca in the pot until completely melted. Add the pork and fry for 6 to 8 minutes, or until light golden brown. Season with the salt, cumin, and pepper. Add the orange and lime juices and top with the bay leaves.
Lock the lid into place and set the steam release valve to sealed. Select Manual or PRESSURE COOK and set the timer for 25 minutes on high.
When cooking is complete, allow the pressure to release naturally. Unlock and remove the lid. Remove and discard the bay leaves.
Using two forks, shred the pork carnitas in the pot. Enjoy! Option