Press the SAUTE button on the instant pot. Let the instant heat up slightly, then add 1 tablespoon of olive oil. Add the meatballs (you may have to cook them in 2 batches) and let cook until brown on one side. As you cook the meatballs you may need to swirl the instant pot around to get the olive oil under each meatball. You may also want to turn the instant pot OFF for a little (then back on again) if it gets too hot. Using a small spatula
flip the meatballs to brown on another side 1-2 minutes. Continue until the meatballs are browned on all sides. (They don't need to be cooked through - just browned.) Transfer to a plate. Repeat with the remaining meatballs if needed.