Begin by setting your Instant Pot to the Sauté mode and add the olive oil. Once hot, add the diced onion and sauté for about 3 minutes until it begins to soften.
Stir in the minced garlic and cook for an additional 1 minute until fragrant.
Add the diced chicken breasts and season with salt and pepper. Cook until the chicken is browned on all sides, about 5 minutes.
Next, add the diced carrots, celery, frozen peas, chicken broth, thyme, rosemary, and Worcestershire sauce if using. Stir everything together to combine.
Close the Instant Pot lid and set it to Pressure Cook on high for 10 minutes.
Once the cooking time is complete, carefully perform a quick release of pressure.
In a separate bowl, whisk together the heavy cream and flour until smooth. Add this mixture to the soup, stirring until it thickens slightly.
Taste and adjust seasoning with more salt and pepper if necessary.
If using biscuit dough, you can top the soup with raw biscuit pieces, seal the lid, and cook on Pressure Cook for an additional 5 minutes.
Once everything is well combined and heated through, serve immediately, garnished with fresh parsley.
Notes
Optional biscuit dough can be added for a topping.