Remove the lid from Instant Pot and press SAUTE function +10 minutes.
Add olive oil, onions, celery, and bell pepper. Cook for 2-3 minutes until fragrant. Add garlic and cook for an additional 1 minute.
Add ground beef, salt, pepper, cumin, paprika, chili powder, and cayenne. Cook for 3-5 minutes until browned.
Stir in tomato paste, tomatoes, broth, parsley, and bay leaves. Turn Instant Pot OFF, then press MANUAL +15 minutes.
When the timer goes off, carefully release pressure and stir chili. Serve over cauliflower rice and add desired toppings (bacon, avocado, cheese, sour cream, green onions, etc.)