Set Instant Pot to Saute and add oil. Pat dry the pork.
Season pork with oregano, rosemary, garlic powder, paprika, salt, and pepper.
Add pork to the hot oil and brown on all sides. Remove the pork from the IP and set aside. Add chicken broth to the Instant Pot and scrape up all the browned bits.
Meanwhile, in a mixing bowl whisk together soy sauce, garlic, maple syrup, olive oil, and brown mustard; stir into the chicken broth.
Return pork to the IP; coat around in the liquid. Turn OFF the Instant Pot. Secure the lid, make sure vent is set to “Sealing”. Pressure cook on HIGH for 5 minutes. Then do a Natural Release for 10 minutes. Manually release any remaining pressure. Remove cover and check that internal temperature of pork registers at 145˚F. If it’s not there yet, just cover with the lid and let it sit a couple minutes. Remove pork from IP and let rest for 5 to 10 minutes before cutting.
While pork rests, make the gravy by whisking together the cornstarch and water in a small mixing bowl. Whisk the cornstarch mixture into the chicken broth inside the IP, add a little bit at a time, to thicken the cooking liquid; cook to a desired thickness. Taste for salt and pepper and adjust to taste.
Slice and serve with prepared gravy.