Yes! After cooking in the Instant Pot, shred the meat and set it in a container with about half the remaining cooking liquid. This can be frozen for up to 3 months (defrost overnight in the refrigerator before serving) or refrigerated for up to three days. Before serving, spread the shredded carnitas with 2-3 tablespoons of the liquid on a sheet pan or place in a cast iron skillet. Reheat in the oven at 350 °F for 10 minutes covered in foil, then remove the foil and crisp under the broiler for a few additional minutes.