Pat the chicken dry and season with salt and pepper.
Set the Instant Pot to Sauté, add olive oil, brown chicken on both sides, and transfer it to a plate.
Sauté garlic for 20 seconds; add broth, wine, capers, lemon juice, and chicken, then turn off Sauté.
Lock the lid and cook at high pressure for 5 minutes.
Naturally release pressure for 5 minutes, quick-release the rest, and remove chicken.
Reduce the sauce on Sauté for a few minutes, then return chicken with parsley and lemon slices.
Serve with the sauce and a side of your choice.