Rinse jackfruit under cold running water; drain and pat dry with paper towels.
Heat 2 tablespoons of the oil in a large skillet over medium-high. Add onion, jalapeño, and garlic; cook, stirring often, until tender and beginning to brown, about 7 minutes. Add jackfruit, and stir to break up fruit. Sprinkle with cumin, coriander, and smoked paprika; cook, stirring constantly, until fragrant, about 1 minute. Stir in orange juice, vegetable stock, and hot sauce, cook, stirring occasionally, until most of liquid has evaporated, about 3 minutes.
Divide mixture among 6 tortillas. Add desired toppings to tacos, and serve with lime wedges.