Sauté the diced onion, carrots, and celery in olive oil in a medium pot over medium heat until softened.
Pour in the chicken bone broth, thyme, rosemary, sea salt, and black pepper, then bring to a gentle boil.
Place the chicken breast into the boiling broth, reduce heat to low, and simmer for 12 minutes until fully cooked.
Remove the chicken from the pot, shred it into bite-sized pieces using two forks, and return it to the broth.
In a small mixing bowl, whisk together the whole wheat flour, baking powder, and water until a sticky dough forms.
Drop small spoonfuls of the dough into the simmering soup, ensuring they are spaced apart.
Cover the pot tightly with a lid and steam for 10 minutes without opening until the dumplings are puffed and cooked through.
Ladle the chicken and dumplings into a bowl and garnish with freshly chopped parsley.