Ideally the potatoes and eggs should be cooked in two separate inner pots in instant pot. Using a separator while steaming ensures energy efficient cooking without the potatoes touching the eggs. It is not very hygienic to cook raw eggs on top of cubed potatoes. Needless to say about the debris on the egg, fear of at least one rotten egg and cross contamination. Cooking the eggs thoroughly kills the Salmonella germs but do you want to take chance on your health.