Turn Instant Pot to SAUTE mode. Once hot, add the butter. Once the butter is melted, add the onion and saute for 2 minutes, stirring frequently. Add the garlic and ginger, cook until fragrant, about 1 minute. Add tomato sauce, tomato paste, garam masala, coriander, both paprika, cumin, tumeric, salt, and pepper. Cook for 3 minutes, then add in chicken thighs and chicken broth.