In 5-quart Instant Pot, heat oil on Sauté-Normal. Add chicken, onion, salt and pepper; cook 9 minutes or until starting to brown, stirring occasionally. Stir in sauce and tomatoes with their juice, scraping browned bits from bottom of pot with wooden spoon. Place lid on Instant Pot and close pressure valve to seal; pressure cook on high 25 minutes. Quick release pressure; let stand 5 minutes before removing lid. Stir in cilantro. Makes about 4 cups.
Prepare rice as label directs. Makes about 3 cups.
Serve chicken mixture over rice garnished with cilantro, if desired.