In 6 or 8 quart Instant Pot, add chicken, sweet potatoes, onion, coconut milk, tomato paste, water, fish sauce, maple syrup, red curry paste, salt and kaffir lime leaves. No need to stir but if you did by accident - it is fine.
Close the lid, turn pressure vent to Sealing and press Pressure Cooking on High for 20 minutes.
After Instant Pot has finished cooking, let Instant Pot sit for 10 minutes and then release remaining pressure using Quick Release method by turning valve to Venting and open the lid.
Remove chicken onto a plate and shred with 2 forks.
Using an immersion blender, puree soup right inside the pot.
Return chicken back to the pot along with peanuts, lime juice, cilantro and bell peppers (optional).
Stir and serve warm.
