Peel and cube potatoes into 1-2 inch cubes.
Place the potatoes in the Instant Pot.
Add enough water to cover the potatoes, then add the salt.
Place the eggs in the Instant Pot on top of potatoes and close the lid, making sure the pressure value is set to close.
Set the instant pot to pressure cook for zero minutes on high pressure.
Chop onion to the desired size.
Once the Instant Pot is done cooking, safely release the pressure by opening the pressure value using a towel, gloves, or hot pad.
Remove the eggs and soak in ice water. Peel and chop the eggs once cooled.
Drain the potatoes from the water and place them back into the Instant Pot
Add onions, eggs, mayonnaise, and remaining seasonings to potatoes.
Mix until combined.
Plate, serve, and enjoy!