Set the Instant Pot to Sauté (high) and add 1 tablespoon olive oil; pat the chicken strips dry and season with 1/2 tsp salt, 1 tsp oregano, 1/4 tsp garlic powder, and 1/2 tsp black pepper.
Sear the chicken in batches for about 1–2 minutes per side until lightly golden; remove to a plate.
Add 1 tsp olive oil to the pot, then sauté the minced garlic for about 30 seconds until fragrant; add the chopped asparagus, sun-dried tomatoes, sliced mushrooms, and a pinch of salt and cook 30–45 seconds until they begin to soften.
Return the seared chicken to the pot, add the pasta, 1½ cups water, ½ cup cream, and 1 tsp salt, stirring to distribute ingredients evenly (make sure pasta is mostly submerged).
Close the lid, set the valve to sealing, and pressure cook on high for 5 minutes (appropriate for spirals, bowties, penne, and similar shapes).
When the cook time ends, quick-release the pressure following your cooker’s instructions, then carefully open the lid.
Stir in the minced basil, lemon zest, grated Parmesan, and red chili flakes (if using); taste and adjust salt and freshly grated black pepper as needed.
Serve the creamy chicken pasta immediately.