Set a 6- to 8-quart electric pressure cooker or Instant Pot to the Sauté function and heat for 5 minutes. Meanwhile, cut the steaks into 1-inch pieces and pat them dry with one sheet of Bounty paper towels. Season with the salt.
Add 2 tablespoons of the butter to the pressure cooker. When melted, add half of the steak pieces and brown on 2 sides, about 3 minutes per side. Transfer the steak to a plate. Repeat melting 2 tablespoons of butter and browning the remaining steak pieces, then transfer steak to the plate.
Carefully pour the beef broth into the cooker and scrape up any browned bits stuck to the bottom with a wooden spoon. Add the garlic, pepper, remaining 4 tablespoons butter, and seared steak and any accumulated juices.
Lock the lid onto the pressure cooker and make sure the valve is sealed. Set for MANUAL, HIGH pressure for 10 minutes cook time. It will take 7 to 10 minutes to come up to pressure.
When the cook time is up, let the pressure naturally release for 5 minutes. Manually release any remaining pressure. Turn the pressure cooker off and uncover. Garnish with the parsley before serving.
