Place ribs into the insert pot of an Instant Pot.

Pour in barbecue sauce, water, garlic powder, and onion powder, stirring to combine well.

Secure lid on Instant Pot and set vent to "sealed."

Using the manual setting, select an 8 minute cook time.

Once cook time is complete, turn unit off and allow a natural pressure release.

After pressure has release and valve has dropped, carefully remove lid.

If you desire the sauce to be a bit thicker, remove ribs to a plate and select the saute function. Whisk cornstarch and water together in a small bowl to create a slurry. Add mixture to the sauce in the insert pot, stirring well to combine. Allow sauce to simmer for 3-5 minutes, or until thickened to your liking. Return ribs to pot, stirring to coat with sauce.

Serve over rice, pasta, or potatoes.