Pour 2 cups of water into the Instant Pot along with the pasta.
Set a trivet (with handles) on top of the pasta and set the frozen ground beef on the trivet.
Cook on high pressure for 5 minutes and natural release for 5 minutes. Note, when the cooking is done, the ground beef will not be completely cooked through.
Move the trivet with the ground beef onto a plate. Drain the pasta into a colander.
Put the inner pot back in the Instant Pot and press the "Saute" setting. When it says "HOT", start browning / breaking up the ground beef for about 2-3 minutes. After browning, I usually like to pour out the oil (from the beef) or scoop it out with a big spoon.
Add in the pasta and the pasta sauce and mix until everything is evenly coated in sauce and heated through.