Place the rice, water, tomatoes, salt, and oil in the pot. Stir to combine. Place the chicken pieces on top and sprinkle generously with your favorite spices and some salt. Turn the instant pot on high pressure for 7-8 minutes. When done, use the quick release valve for the steam.
Remove the chicken. Mix the black beans (and maybe a little sunshine sauce) in with the rice.
Divide the rice and beans amongst 4-6 meal prep containers. Top each with a piece of chicken. Sprinkle with cilantro and drizzle with a spoonful of sauce.