Place chicken breast in Instant Pot with 1 cup water and cook on high pressure for 12-18 minutes depending on size of chicken breast. If chicken breast is frozen, cook for 20 minutes.
Wash and wrap sweet potato in paper towel. Poke multiple holes in potato with fork. Microwave for 5-8 minutes, again depending on size of potato. Just be sure it is cooked to fork tender.
When chicken is done, shred it. Cut potato in half.
Stuff potato with 1 cup shredded chicken. Top with ranch dressing and buffalo sauce to your desired amount. Enjoy!