Using your pressure cooker to cook a whole chicken couldn't be easier. Feel free to use any chicken seasoning you like.
Combine salt, paprika, cayenne, onion powder, thyme, black pepper, white pepper, and garlic powder together in a small bowl. Rub the outside of the chicken and inside the cavity generously with the seasoning mixture.
Turn on an electric pressure cooker (such as Instant Pot®) and select Saute function. Pour oil into the pot and allow to get hot, 1 to 2 minutes.
Brown chicken in the hot oil on each side (breast side and back side) for 2 to 3 minutes. Remove chicken from the pot and set it aside on a plate. Cancel Sauté function.
Pour chicken stock into the pot and scrape the bottom with a wooden spoon to loosen any browned bits.
Place a steamer rack trivet in the bottom of the pressure cooker pot, then place the whole chicken, breast side up, on top of the trivet.
Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 25 minutes. Allow about 6 minutes for pressure to build.
Let pressure release naturally according to manufacturer's instructions, 25 to 35 minutes. Unlock lid and remove.
Open the lid and carefully remove the chicken from the pressure cooker. Allow the chicken to rest for 10 minutes before carving.