Season the chuck roast all over with salt and black pepper. Set the Instant Pot to saute mode and add the olive oil. Sear the roast for 4 minutes per side until a deep brown crust forms on both sides. Remove and set aside.
Add the sliced onion to the pot and cook for 4 minutes until softened and lightly caramelized. Add the garlic and cook for 30 seconds.
Pour in the beef broth, soy sauce, and worcestershire sauce, scraping up all the browned bits from the bottom. Stir in the dried thyme and bay leaves.
Return the seared roast to the pot. Lock the lid and set the valve to sealing. Pressure cook on high for 60 minutes.
When the cook time is complete, allow a natural pressure release for 15 minutes, then carefully switch the valve to venting. Remove the lid once the pin drops.
Transfer the roast to a cutting board and discard the bay leaves. Shred or thinly slice the beef against the grain. Strain the cooking liquid into a bowl for the dipping jus.
Preheat your oven broiler. Place the split hoagie rolls on a baking sheet, pile the shredded beef onto each roll, and top with a slice of provolone cheese. Broil for 2 to 3 minutes until the cheese is melted and bubbly and the edges of the rolls are toasted.
Serve the sandwiches immediately with small bowls of the warm jus for dipping.