Preheat oven to 400 degrees Fahrenheit (200 degrees Celsius).
Pierce sweet potatoes multiple times with a fork and bake for 45 to 50 minutes until tender throughout.
While potatoes bake, combine shredded chicken, frozen peas and carrots, and chicken broth in a medium skillet over medium heat.
Simmer the mixture for approximately 5 minutes until vegetables are fully heated through and broth is slightly reduced.
Reduce heat to low and stir in Greek yogurt, garlic powder, onion powder, dried thyme, salt, and pepper until the mixture is creamy and well combined; do not allow the yogurt to boil.
Slice the baked sweet potatoes lengthwise and gently fluff the interior flesh with a fork.
Spoon a generous portion of the chicken pot pie mixture into each sweet potato cavity.
Return stuffed potatoes to the oven for an additional 5 minutes to ensure internal temperature consistency.
Garnish with fresh parsley and serve immediately.