Fill your instant pot with 1 cup of water.
Place a trivet inside of the instant pot.
Grease a 7-inch push pan with cooking spray and set aside.
In a medium bowl, toss together the sliced apples, granulated sugar, lemon juice, and cinnamon.
Pour sugared apples into the greased push pan.
Using the same bowl, mix together the brown sugar, flour, rolled oats, and salt.
Pour in the melted butter and mix together with a fork until the ingredients are wet.
Pour the oat mixture over the sugared apples.
Create a foil sling by folding a 2-foot piece of aluminum foil into thirds lengthwise.
Cover the push pan with a paper towel and a piece of foil. (this is to absorb any access moisture.
Place the covered push pan on to the center of the foil sling and carefully lower into the instant pot. Fold the ends of the foil sling over the top of the covered push pan.
Close the lid and set to "sealing".
Cook on manual - high pressure - for 8 minutes.
Quick Pressure Release (QPR)
Enjoy immediately.