How to Make It
Set Instant Pot to SAUTÉ setting. Add butter; cook until melted, about 1 minute. Add panko and 2 teaspoons of the thyme; cook, stirring often, until toasted, about 3 minutes. Transfer mixture to a small bowl. Wipe pot clean.
Add 1 tablespoon of the oil to Instant Pot. Sprinkle chicken with pepper and 1 1/4 teaspoons of the salt. Cook 2 leg quarters, skin side down, until browned, 4 to 5 minutes. Turn and brown on other side, 2 to 3 minutes. Transfer chicken to a plate. Repeat with remaining oil and chicken. Add sausage, bacon, and garlic to pot. Cook, stirring occasionally, until lightly browned, 3 to 4 minutes. Turn Instant Pot off. Stir in stock, beans, tomato paste, and remaining 3/4 teaspoon salt. Nestle chicken quarters into mixture.
Cover cooker with lid, and lock in place. Turn steam release handle to SEALING position. Select HIGH pressure, and cook 1 hour. Carefully turn steam release handle to VENTING position, and let steam fully escape. Remove lid. Spoon beans into shallow bowls. Top with chicken, and sprinkle with breadcrumb mixture and remaining thyme.