Season chicken thighs with pepper and salt. Select Sauté setting on Instant Pot and, once hot, add oil to coat bottom of pot. Add chicken thighs, cook for 2 minutes per side, then turn Sauté setting off. (If you cannot fit chicken thighs in Instant Pot pot in even layer to sauté, put in enough chicken to cover bottom of pot then remove, set aside on plate, and add remaining chicken to sauté on both sides. We want to be sure each piece of chicken has opportunity to be cooked on each side. If you go this route, return all chicken thighs to Instant Pot pot before moving on to next step.)

To Instant Pot with chicken thighs still in pot, add chicken stock, coconut aminos, onion, garlic, vinegar, bay leaves, monk fruit sweetener, and paprika. Seal lid and cook on Manual setting (high pressure) for 10 minutes.

Once cooking has finished, quick-release pressure then remove lid. Using tongs, transfer chicken thighs to a plate. Select Sauté setting and simmer sauce until it has thickened, about 15 minutes, stirring occasionally. Remove bay leaves, add chicken back to pot to warm through, before serving in bowls with a garnish of sliced spring onion and, optionally, atop cauliflower rice or alongside low-carb vegetables.