Turn the Instant Pot to the 'Sauté' mode. Add olive oil and diced chicken. Season with salt and pepper. Cook for about 5 minutes until browned but not cooked through. Remove the chicken from the pot and set aside.
In the same pot, add the diced onion and cook until translucent (about 2-3 minutes). Add minced garlic and sauté for another 30 seconds until fragrant.
Pour in the chicken broth, followed by the thyme and dried parsley. Scrape the bottom of the pot to prevent any burn notices.
Add sliced carrots and uncooked pasta to the broth mixture. Stir well. Return the browned chicken to the pot.
Close the lid of the Instant Pot and set it to 'Manual' or 'Pressure Cook' on high for 5 minutes. Once done, perform a quick release.
In a small bowl, whisk together heavy cream and flour until smooth. Open the Instant Pot and stir in the cream mixture. Switch back to 'Sauté' mode and cook for an additional 2-3 minutes until the sauce thickens.
Stir in the peas, and let them heat through for about 2 minutes. Adjust seasoning with salt and pepper if needed.
Notes
Serve warm, drizzling extra cream sauce over the top and garnishing with fresh parsley.