Turn your Instant Pot on to saute mode and add the olive oil. Once the oil is heated and shimmering, add onion and garlic. Stir and cook until fragrant, about 1 minute.
Add the carrots and celery. Stir occasionally and cook until slightly softened, about 2 minutes.
Add in the chicken, chicken broth, turmeric, kosher salt, pepper, and orzo. Stir to combine.
Tie the fresh thyme, rosemary, and bay leaves together with kitchen twine and place on top of the soup.
Seal the Instant Pot lid and cook on manual mode on high pressure for 5 minutes. After the time is up, quick-release the pressure valve.
Remove the thyme, rosemary, and bay leaf bundle from the pot.
Stir in the fresh lemon juice. Taste and add more lemon juice, salt, and pepper to your liking. Garnish with fresh parsley and serve immediately.