Place pork in the Instant pot or any other pressure cooker. Add water , salt and pepper. Close the lid and set the timer to 40 minutes on high pressure. Once done, quick release the pressure.
Meanwhile wash your spaghetti squash and cut lengthwise. Remove seeds.
Place the trivet on top of the pork. Add prepared spaghetti squash. If it doesn't fit, cut it in quarters.
Sprinkle with some salt and close and lock the lid Set the timer to 8 minutes high pressure. After its done- quick release it.
Carefully remove the squash. Shred it, leaving just skin Remove pork and shred it separately, mixing with juices.
Serve. Place squash on the bottom, then add some pulled pork with juices on top and sprinkle with some chopped scallions.
Notes
For Weight watchers: myWW green plan 4 points,myWW blue plan 4 points,myWW purple plan 4 points per serving (all calculations are done by adding ingredients to Weight watchers app calculator)