Close and lock lid, set pressure cooker to "poultry", and adjust time to 5 minutes, and press "start/stop".
When done, quick release and make sure all pressure is released before opening lid. Carefully open lid and shred chicken with fork. Add squash, Asian noodles, and bell peppers to cooker. Close and lock lid and set pressure cooker to "steam/veggies". Adjust time to 3 minutes and press "start/stop".
When done, quick release and make sure all pressure is released before opening lid. Carefully open lid and add spinach. Stir well. Garnish with scallions (green) and serve hot.