Place apples on the bottom of your Instant Pot. Dump in 1/2 cup of water. Sprinkle with cinnamon and nutmeg and 1/2 tsp of salt. Top with maple syrup.
Melt the butter. In a small bowl, mix together melted butter, oats, flour, and brown sugar. Drop by the spoonful on top of the apples.
Secure the lid on the instant pot. Use the manual setting, and cook on high pressure for 5 minutes.