Peel or do not peel apples - for store bought texture and colour applesauce I recommend to peel. Core and cut apples in quarters. Add to 6 or 8 quart Instant Pot along with water.
Close the lid, set pressure release valve to Sealing and press Pressure Cook on High or Manual for 8 minutes. After release pressure right away - called Quick Release.
Open the lid. More likely you won't even have to mash cooked apples - I didn't. But if you still see chunks, mash with a potato masher. With unpeeled apples, use an immersion blender.
Add lemon juice, stir, taste and season to your taste with sweetener and cinnamon, if necessary.
Notes
Store: Refrigerate in an airtight container for up to 7 days.
Freeze: Freeze in any containers, silicone bags or jars leaving some room for expansion for up to 3 months. Thaw on counter for 6-8 hours and enjoy!
Don't double water: No matter the amount of apples you add, do not double water. Add same 1/4 cup cold water for any amount of apples that are not exceeding 2/3 max mark.
Unpeeled apples+no water: If you have older model of Instant Pot that is not as sensitive to Burn, I had success adding unpeeled apples and no water. I found peels contain a lot of water which leads to more runny sauce. While coming to pressure, that water is being extracted and enough to bring pot to pressure. You can try but don't walk away.