Combine shredded jackfruit, sliced onion, garlic, chipotle pepper, adobo sauce, spices, broth, and lime juice in Crockpot.
Stir well so jackfruit absorbs the spice blend evenly.
Cook on low for 6–8 hours (or high for 4 hours) until “meat” becomes tender and flavor-packed.
Adjust seasoning with salt and pepper; stir to distribute juices.
Warm tortillas in a skillet or microwave until pliable.
Assemble tacos by piling barbacoa onto tortillas and topping with avocado, cilantro, lime, vegan cheese, and onion.
Serve immediately, letting guests customize their own.