If you do not have an Instant Pot, you can make this message stovetop. Put pork and water in a pot on medium-high heat. When it reaches a boil, turn the heat down. Skim off the scum from the top and sides of pot. Add all ingredients, except bok choy and squash. Simmer for 90 minutes, until pork is tender. Add squash and bok choy and simmer for an additional 10 minutes.