Turn the Instant Pot to the Saute function. Add the butter. When it's melted, stir in the oats, currants, syrup and salt. Stir until the oats are toasted about 3 minutes.
Stir in 3 ¼ cups water. Lock on the lid and set the valve to sealing. Set to high pressure for 10 minutes. When finished, allow the pressure to release naturally for 10 minutes, then do a pressure release.
Stir and then serve with additional butter or maple syrup if you wish.