Dice the chicken breast into bite-sized pieces and season with half of the sea salt and black pepper.
Heat the olive oil in a medium pot over medium heat and sauté the onion, carrots, and celery until the onions are translucent.
Add the chicken pieces to the pot and cook for 3-4 minutes until lightly browned on the outside.
Pour in the chicken bone broth, dried thyme, and garlic powder, then bring the mixture to a gentle simmer.
In a small mixing bowl, whisk together the whole wheat flour, baking powder, and the remaining salt and pepper.
Fold the Greek yogurt into the flour mixture using a fork until a soft, slightly sticky dough forms.
Stir the frozen peas into the simmering broth mixture.
Drop small, teaspoon-sized dollops of the dough onto the surface of the simmering liquid, ensuring they are spaced apart.
Cover the pot with a tight-fitting lid and simmer on low heat for 10-12 minutes without lifting the lid.
Remove from heat once the dumplings are puffed and cooked through, then garnish with fresh parsley and serve warm.