This is about cooking eggs at various donenness levels, not just making hard boiled eggs. You would still need to pay attention to the time in an Instant Pot for that.
The wording you have used so far suggests to me that, every time you boil eggs, you hard boil them. Not everybody does that. Some people soft or medium boil their eggs and variations in between.
So boiling eggs is not the same as hard boiling eggs.