Heat the Instant Pot to saute and add two tablespoons of the oil.
Toss the pork cubes with salt and pepper to taste and brown them in two batches for 4 minutes per side, making sure to add the remaining two tablespoons of oil between batches. Remove the pork to a bowl when finished.
When all the pork is cooked, add the onion and saute for 3-4 minutes, until it begins to turn translucent. Add the garlic and cook for another minute. Pour in the homemade salsa and 2 cups of the chicken broth, then return the pork to the pot. If you want to make 4 servings of very meaty chili, add the additional salt, more pepper, and spices here. If you like your chili a bit more brothy and want more servings, add another cup of chicken broth and a cup of prepared salsa verde to the pot at this point.
Set the Instant Pot for the Stew setting, or 45 minutes at high pressure if you're using a different style of pressure cooker. Allow for a natural release. Serve immediately or package for meal prep.
Macros for 4 servings: 513 calories, 13 grams net carbs, 32 grams protein, 36 grams fat. Macros for 6 servings: 351 calories, 9 grams net carbs, 21 grams protein, 24 grams fat.