Most Instant Pot recipes you see call for too much fluids. The creator of the recipe is simply following a stove-top recipe without making the necessary adaptation.
Most recipes that calls for more than 2 cups of water/broth/etc. for a 6 qt recipe, are bogus because all the meat and veg you put in your Instant Pot will release a lot of fluids. Adding more than 2 cups results in a very watery and bland product. Most of my recipes only use the minimum 1 cup needed to reach pressure.
The exception to this is my Doukhobor Borshch recipe. It calls for half of the water from the stove-top version.
A good rule of thumb when converting a stove-top recipe to an Instant Pot recipe is to cut the amount of water/broth/etc. in half. And if you are cooking with lots of veg, including tomato, you can get away with adding less than the 1 cup minimum because those items will release a lot of fluids.