01 - Set the Instant Pot to Sauté mode. Add olive oil and heat until shimmering. Add diced onion, sliced carrots, and celery. Cook for 3 to 4 minutes, stirring occasionally, until vegetables soften.
02 - Add minced garlic and continue sautéing for 1 minute until fragrant.
03 - Add chicken pieces, chicken broth, salt, pepper, bay leaf, dried thyme, and dried rosemary to the pot. Stir to evenly distribute ingredients.
04 - Secure the lid and ensure the valve is sealed. Cook on High Pressure for 10 minutes.
05 - Allow natural pressure release for 5 minutes, then carefully perform a quick release to release any remaining pressure.
06 - Remove the chicken from the pot and shred it with two forks.
07 - Add the egg noodles to the pot, then return shredded chicken to the soup. Set Instant Pot to Sauté and cook for 5 to 6 minutes, stirring occasionally, until noodles are tender.
08 - Stir in chopped fresh parsley and lemon juice if using. Adjust seasoning with salt and pepper to taste.
09 - Ladle soup into bowls and garnish with extra parsley as desired. Serve hot.