Drain the jackfruit and seitan, then pat dry thoroughly with a paper towel to ensure they crisp up in the pan.
Use two forks to shred the seitan and jackfruit into thin, carnitas-style strands.
In a large skillet, heat the olive oil over medium-high heat and add the shredded mixture along with cumin, paprika, garlic powder, onion powder, salt, and pepper.
Cook for 8-10 minutes, stirring occasionally, until the edges are golden brown and slightly crispy.
While the filling cooks, mash the avocado with lime juice in a small bowl until smooth and creamy.
Warm the corn tortillas in a dry pan or over an open flame for 30 seconds per side.
Divide the carnitas mixture between the tortillas, top with a dollop of avocado crema, and garnish with fresh cilantro.