Add measured rice, chicken broth and garlic to the bottom of Instant Pot (or any pressure cooker) and stir to combine. Place chicken breasts in and season well with salt and pepper.
Top chicken with tomatoes, onion, chili powder, cumin and hot sauce (or smoked paprika) if desired. Gently mix the spices into the tomatoes.
Close and lock Instant pot and turn steam release to sealing.
Turn on to pressure cooker and set for 25 minutes. That's it! Walk away, read a book, chase the kids, whatever! It can take around 20 minutes for the pressure to build if using frozen chicken.
At the end of 25 minutes, do a quick release by moving the steam release to venting.
After steam has released completely, shred chicken (you can remove it with tongs to do this), add in cheese, and stir until melted. Top with lots of chopped cilantro.
Serve with your favorite toppings and enjoy!