Season the pork loin evenly with half of the garlic powder, smoked paprika, sea salt, and black pepper.
Place the seasoned pork and vegetable broth in a slow cooker and cook on low for 6-8 hours until the meat is tender enough to shred.
Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Peel and dice the sweet potato into 1-inch cubes, and chop the bell peppers and red onion into similar bite-sized pieces.
In a large bowl, toss the sweet potatoes, peppers, and onions with olive oil and the remaining seasonings.
Spread the vegetables in a single layer on the baking sheet and roast for 25-30 minutes until the sweet potatoes are tender and the edges are caramelized.
Carefully remove the pork from the slow cooker and shred it using two forks, discarding any excess liquid if desired.
Serve the shredded pork alongside the roasted vegetable medley while hot.