Set the Instant Pot to Sauté on high and add 1 tablespoon olive oil.
In a bowl, season the chicken strips with 1/2 teaspoon salt, 1 teaspoon oregano, 1/4 teaspoon garlic powder and 1/2 teaspoon pepper; toss to coat.
Sear the chicken in the hot pot 1–2 minutes per side until lightly golden; remove to a plate.
Add the additional 1 teaspoon olive oil to the pot, then sauté the minced garlic about 30–45 seconds until fragrant.
Add the chopped asparagus, sun-dried tomatoes, sliced mushrooms and a pinch of salt; sauté about 45 seconds until vegetables begin to soften.
Return the seared chicken to the pot, add the pasta, 1 1/2 cups water, 1/2 cup cream and 1 teaspoon salt; stir to combine and ensure pasta is submerged.
Close the lid, set the valve to sealing, and cook on high pressure for 5 minutes (suitable for spirals, bowties, penne or similar shapes).
When the cook time ends, perform a quick release according to your cooker instructions, then open the lid carefully.
Stir in the minced basil, lemon zest, grated Parmesan, and a pinch of red chili flakes if using; adjust salt and freshly grated black pepper to taste.
Serve the creamy chicken pasta immediately.