Cut the chicken breast into 1-inch bite-sized pieces.
Heat the olive oil in a medium pot over medium heat and sauté the onion, carrot, and celery until the onion is translucent.
Stir in the dried thyme, dried rosemary, sea salt, and black pepper, then pour in the chicken broth and bring to a gentle simmer.
Add the chicken pieces to the pot and cook for 5 minutes while you prepare the dumpling dough.
In a small bowl, whisk together the whole wheat flour and baking powder, then fold in the Greek yogurt and chopped parsley until a thick dough forms.
Drop small spoonfuls of the dough into the simmering broth, cover the pot with a tight-fitting lid, and cook for 10-12 minutes without lifting the lid.
Serve the chicken and dumplings hot, ensuring each bowl has a balance of tender chicken, vegetables, and fluffy dumplings.