If the ribs have the membrane skin on the back, remove it.
Combine the salt, pepper, smoked paprika, garlic powder and onion powder in a small bowl, stir to combine.
Top both sides of the ribs with the dry rub, and rub in.
Place the trivet inside your Instant Pot. Pour in 1 cup of water.
Stand the ribs upright inside, so the bones are vertical. My ButcherBox ribs come pre-cut in half. If you have a full rack, you can curve it around to fit inside or cut them smaller. Close with the lid. Make sure the vent is in the sealed position.
Cook on manual pressure for 25 minutes. Naturally release pressure for 15 minutes, then do a quick release.
After the 25 minutes, preheat your oven on broil. Line a rimmed baking sheet with aluminum foil.
Place the ribs on the baking sheet. Brush with BBQ sauce.
Broil the ribs in your oven for 5-8 minutes, until charred and crispy. Keep a close eye on them. My oven takes exactly 7 minutes. (You can also do this on your BBQ, but I prefer the oven)
Remove from the oven, and allow to cool for 5 minutes. Slice the ribs and serve.
Leftovers will keep in an airtight container for 5 days.