Use the pot in pot for dairy heavy porridge recipes. Just stop fighting the burn sensor and find a way around it.
For the recipe that uses the pot in pot and requires dairy ingredients, how much water should be used in the outer pot? Does it come to pressure to the same degree?
4 minutes of pressure and 10 minutes of NR for steel cut oats is 25 minutes total which is more than enough time to make oatmeal on the stove.