Heat olive oil in a large pot over medium heat and sauté onion, carrots, and celery until soft.
Add garlic and cook for 1 minute until fragrant.
Pour in chicken broth and bring to a simmer.
Stir in shredded chicken, thyme, parsley, salt, and pepper.
In a bowl, mix flour, baking powder, and salt for dumplings.
Add milk and melted butter to form a soft dough.
Drop spoonfuls of dumpling dough into simmering soup.
Cover and cook for 15–20 minutes until dumplings are fluffy and cooked through.
Taste and adjust seasonings before serving.