Set Instant Pot to sauté mode. Add in oil, onions, garlic, seasonings, salt, and pepper. Saute for a few minutes until onions are cooked down.
Add in ground turkey and sauté until browned for about 5 minutes.
Add peppers, sweet potatoes, crushed tomatoes, and sweet potato purée and continue to sauté for a few more minutes until everything is well combined and cooked down.
Press cancel on your instant pot. Set to pressure cook on high for 10 minutes. Close the lid, and turn the pressure valve on the lid to sealing.
Once finished, quick-release pressure by turning the pressure valve to Venting. Once all steam is released, open Instant Pot.
Add in lemon juice. Turn back to sauté mode and let the chili thicken a bit on heat while stirring intermittently. Turn off after a few minutes. Taste and adjust seasonings as necessary.
Ladle into bowls and garnish with freshly chopped cilantro, red onions, avocado, cheese, or anything else you like on chili! Serve hot and enjoy!