Set the Instant Pot to Sauté mode and heat olive oil. Add diced onion, sliced carrots, and celery. Cook for 3 to 4 minutes until softened.
Incorporate minced garlic and sauté for an additional 1 minute until fragrant.
Add chicken pieces, chicken broth, salt, black pepper, bay leaf, dried thyme, and rosemary. Stir thoroughly to combine.
Seal the Instant Pot and cook on High Pressure for 10 minutes.
Allow natural pressure release for 5 minutes, then perform a quick release for any remaining pressure.
Remove chicken from pot and shred using two forks.
Add egg noodles to the pot alongside shredded chicken. Set Instant Pot to Sauté and cook for 5 to 6 minutes until noodles become tender.
Stir in chopped fresh parsley and optional lemon juice. Adjust seasoning to preference.
Ladle soup into bowls and garnish with additional parsley as desired. Serve hot.
