Select Sauté and add the olive oil to the inner pot. Once the oil is hot, add the ground turkey. Cook for 2 minutes, using a wooden spoon to break up the meat and keep it from sticking to the pot.
Press Cancel and add the sweet potatoes, onion, garlic, celery, carrots, bell pepper, tomatoes, and chicken broth to the pot.
Lock the lid into place. Select Pressure Cook or Manual; set the pressure to High and the time to 10 minutes. Make sure the steam release knob is in the sealed position. After cooking, naturally release the pressure for 10 minutes, then quick release any remaining pressure.
Unlock and remove the lid. Stir in the cumin, chili powder, and salt (if using).
Serve immediately garnished with fresh cilantro, or place the chili in an airtight container and refrigerate for up to 4 days or freeze for up to 2 months.