In the insert pot of an Instant Pot, add frozen hash brown potatoes, chicken broth, cream of chicken soup, yellow onion, black pepper and garlic powder.
Close the lid and set the vent to the sealed position.
Select a 10 minute cook time at high pressure using the Manual/Pressure Cook setting.
When the cook time has completed, perform a quick release of pressure.
Once pressure has released and the valve has dropped, carefully remove the lid.
Add cubed cream cheese to the insert pot, stirring for a few minutes to allow it to melt. If needed, use the back of a spoon to smash any larger clumps of cream cheese so they will melt easily.
Garnish with bacon crumbles, shredded cheese and green onions.