Place condensed soup, broth, water, parsley, pepper, and garlic powder in a slow cooker. Whisk to combine.
Add chicken to the slow cooker, cover, and cook on LOW for 2-4 hours, or on HIGH for 1-2 hours.
Remove the chicken from the slow cooker and set aside.
Turn the slow cooker to HIGH and stir in the noodles. Cover and cook on HIGH for about 15-20 more minutes (or until pasta is still a bit firm, but almost done). Stir the noodles occasionally as they cook.
While the noodles are cooking, dice the chicken or shred with two forks. Return the chicken to the slow cooker. Stir with the noodles and sauce, and continue cooking just until the pasta is done (about 5-10 more minutes). Keep a close eye on the noodles because you don’t want them to be overcooked and gummy.
Taste the mixture and season with salt and pepper, if necessary. Garnish with chopped fresh herbs and serve!