Sprinkle wings with the garlic powder and season with salt and black pepper, to taste. Place metal trivet inside Instant Pot and add one cup of water. Arrange seasoned wings on top of the trivet before locking the cover in place. Close the vent and set to High Pressure/Manual for 8 minutes.
While the wings cook, whisk the Frank’s hot sauce, melted butter, vinegar, and 1/2 teaspoon garlic powder in a bowl until thoroughly combined. Set aside.
When done cooking, allow pressure to naturally release for 10 minutes, then open vent to release any remaining steam. Carefully remove lid and transfer wings to a large bowl. Set aside until just cool enough to handle.
Meanwhile, position oven rack in the top position and pre-heat broiler to high. Line a large, rimmed baking sheet with aluminum foil and place a wire cooling rack on top. Set aside.
Pour 1/3 of the buffalo sauce on top of the wings and toss to coat. Transfer the wings to the wire rack on the prepared baking sheet and place under the broiler for 3-4 minutes or until the wings start to get crispy and develop some color. Turn the wings and repeat this process.
Remove baking sheet from oven and toss the wings with half of the remaining buffalo sauce. Serve immediately with sliced celery, blue cheese dressing, and the remaining sauce on the side for dipping. Enjoy!