Spray the slow cooker or Instant Pot with non-stick spray and add the chicken, salsa, and half of the chicken broth. Cooking on high for about one hour allows the chicken to become tender and soak up the flavorful salsa.
Carefully remove the chicken using tongs and shred it with forks. This ensures that every bite of soup has tender, juicy chicken pieces.
Return the shredded chicken to the slow cooker and add the remaining chicken broth, shredded cheese, heavy cream, salt, and pepper. Cook on high for an additional 30 minutes, letting the flavors meld together.
Spoon the soup into bowls and top with tortilla strips, fresh cilantro, and extra cheese. You can also add sliced avocado or pickled jalapeños for a more vibrant flavor.