Cook the noodles according to the package. Drain and run cold water over them to stop the cooking. Drain and set aside.
Rinse the jackfruit with water and rip up the larger pieces with your hands to lightly shred it. Transfer the shredded jackfruit to a large soup pot.
Add the onions, garlic, bay leaves, fresh thyme sprigs, and vegetable broth to the jackfruit. Bring to a boil and turn down to a simmer. Simmer for 10 minutes.
Add the carrots, and celery to the pot and simmer for 15 minutes or until tender.
Turn off the heat. Add the lemon juice, nutritional yeast, parsley, salt, and pepper. Taste and adjust the seasoning. Discard the bay leaves and thyme sprigs.
Add a scoop of cooked noodles to each bowl. Ladle the hot soup over the noodles and serve immediately.