Combine shredded chicken, carrots, celery, peas, and potatoes in a large bowl.
Add cream of chicken soup, chicken broth, garlic powder, onion powder, thyme, salt, and pepper. Mix well.
Pour the mixture into the crockpot, spreading it evenly.
Cover and cook on low for 6-8 hours until vegetables are tender.
Preheat the oven to 425°F (220°C) 30 minutes before serving.
Roll out the pie crust and cut it to fit the crockpot.
Place the crust on top of the chicken mixture in the crockpot.
Bake in the oven for 15-20 minutes until the crust is golden brown.
Remove from the oven and let cool for a few minutes.
Serve warm and enjoy your delicious crockpot chicken pot pie!