Preheat oven to 375°F (190°C).
Heat olive oil in saucepan; sauté onion, garlic, carrots, and celery until soft.
Stir in flour, cook 2 minutes, then add broth and coconut milk, whisking until thick.
Add jackfruit, sweet potatoes, thyme, salt, and pepper; simmer 10 minutes.
Pour filling into baking dish; cover with pie crust, seal edges, and cut vents.
Bake 35 minutes until crust is golden and bubbly.
Let cool 5 minutes, then serve warm and dig in.