Put pot insert into Instant Pot and add 1 1/2 cups water into pot. Add steam rack.
Peel potatoes (if desired) and cut into chunks. Add to steamer basket, along with eggs.
Put lid on Instant Pot and set to Sealing mode. Press egg button or manually set for 5 minutes. While these are cooking, you can make dressing with remaining ingredients.
When timer goes off, let it naturally release the pressure for 5 minutes.
Release remaining pressure manually. Immediately remove eggs and put into an ice water bath for 5 minutes. Remove potatoes and let cool.
Chop eggs and add potatoes and eggs to salad. Stir to combine, then chill.