Rub the pork loin evenly with sea salt, black pepper, ground cumin, dried oregano, and garlic powder.
Place the seasoned pork in a slow cooker and cook on low for 6 to 8 hours until the meat is tender enough to shred with a fork.
Remove the pork from the slow cooker and shred it into bite-sized pieces using two forks.
Heat the avocado oil in a large cast-iron skillet over medium-high heat.
Add the shredded pork to the skillet in a single layer and sear for 3 to 5 minutes without stirring until the edges become golden and crispy.
Warm the corn tortillas in a separate dry pan over medium heat for 30 seconds per side until they are soft and pliable.
Assemble the tacos by dividing the crispy pork between the two warm tortillas.
Top each taco with sliced avocado, diced red onion, fresh cilantro, and salsa verde.
Finish with a fresh squeeze of lime juice over the top and serve immediately.