Place 4 medium bone-in, skin-on chicken thighs on cutting board. Sprinkle generous amounts of salt and freshly cracked black pepper onto frozen chicken thighs.
Pour 1 cup chicken broth into Instant Pot insert. Place Instant Pot trivet in bottom of Instant Pot insert, then place seasoned chicken thighs on trivet.
Secure lid on Instant Pot and lock lid with vent in Sealing position. Set Instant Pot to Manual High Pressure mode, and set cook time to 13 minutes. Instant Pot will pressurize and then 13-minute cook time will begin.
Once 13-minute cook time ends, Natural Release internal pressure 5 to 10 minutes.
While pressure releases, preheat broiler. Adjust oven racks as needed so that chicken thighs will sit 10 to 12 inches beneath heating element.
After releasing pressure, transfer chicken thighs to baking sheet, placing chicken thighs skin-side up.
Place baking sheet under preheated broiler. Broil chicken thighs 5 to 10 minutes or until skin is golden brown and crispy.
Carefully remove baking sheet from oven. Let chicken thighs rest 5 minutes, then transfer thighs to serving plates and serve with preferred sides.