Season the beef chunks with salt and black pepper.
Set the Instant Pot to the Sauté function and add olive oil. Once hot, sear the beef chunks on all sides until browned. Remove and set aside.
In the same pot, add the diced onion and sauté for about 3-4 minutes until softened. Add the minced garlic and chopped jalapeño, cooking for an additional minute until fragrant.
Stir in the ground cumin, dried oregano, and chipotle powder, cooking for about 30 seconds to bloom the spices.
Return the beef to the pot, followed by the beef broth, apple cider vinegar, and lime juice. Stir to combine everything thoroughly.
Secure the lid on your Instant Pot, ensuring the valve is set to 'Sealing.' Set to Pressure Cook on high for 45 minutes.
Once the cooking time is complete, let the pressure release naturally for 15 minutes before switching the valve to 'Venting' to release any remaining pressure.
Open the lid and transfer the beef to a cutting board. Using two forks, shred the beef.
If desired, switch the Instant Pot back to the Sauté function, allowing the remaining liquid to simmer for a few minutes to thicken. Adjust seasoning as needed.
Return the shredded beef to the pot to soak up the juices. Serve with warm tortillas and garnish with freshly chopped cilantro.
Notes
Adjust chipotle powder to taste for desired heat level.