Pat chicken dry. Season both sides with salt, pepper, garlic powder, and Italian seasoning.
Sauté mode on high. Add oil. Sear chicken 3 min per side. Remove to a plate.
Add garlic. Stir 60 sec until pale gold. Add tomato paste. Stir 90 sec until darkened.
Add sun-dried tomatoes. Stir 30 sec.
Pour in stock. Scrape every bit from the pot bottom until clean. Turn Sauté off.
Nestle the chicken in a single layer. Seal lid. Valve to Sealing. Pressure Cook High 8 min.
Natural release 5 minutes. Then quick release.
Check internal temperature 165°F / 74°C minimum. If not reached, cook 2 more minutes.
Remove chicken. Sauté mode on medium. Add cream. Simmer gently 3–4 minutes.
Turn Sauté off. Add Parmesan in 3 stages, stirring fully between each.
Taste for salt. Return chicken. Spoon sauce over each piece. Add basil off the heat. Serve.