In a 6 or 8 quart instant pot, place metal steaming rack and 1 cup of water inside the inner pot.
Inside a heat safe medium bowl mix together oats, remaining water, milk of choice, pinch of salt and maple syrup, if using. (see note about bowl)
Place the bowl on top of the rack, place the lid on the Instant Pot and set the valve to sealing.
Cook on manual high pressure for 8 minutes. Allow pressure to release naturally for 10 minutes, and then release any remaining pressure.
Remove bowl from Instant Pot and serve with desired toppings.
If preparing make-ahead oatmeal, place into individual containers and let cool completely before covering. Oatmeal will keep in the refrigerator for up to 5 days. Reheat gently on the stove top with a little extra water or milk, or using preferred method.