Drain and rinse the jackfruit, then shred it using two forks into thin, meat-like strands.
Finely crumble the seitan into small pieces to match the texture of the shredded jackfruit.
Heat the avocado oil in a large skillet over medium-high heat.
Add the shredded jackfruit, crumbled seitan, smoked paprika, ground cumin, garlic powder, and sea salt to the pan.
Sauté the mixture for 8 to 10 minutes, stirring occasionally, until the edges of the jackfruit and seitan become crispy and golden brown.
Stir in the black beans and nutritional yeast, cooking for another 2 minutes until everything is heated through.
In a small bowl, mash the avocado with the soy Greek yogurt and lime juice until a smooth, creamy consistency is reached.
Warm the corn tortillas in a dry skillet or directly over a low gas flame for 30 seconds per side.
Divide the jackfruit and seitan carnitas evenly between the two warm tortillas.
Top each taco with a dollop of the avocado crema and a sprinkle of fresh cilantro before serving.