Preheat the oven to 425°F (220°C). Peel and dice the sweet potatoes into evenly sized ½-inch cubes.
Toss the sweet potatoes with olive oil, garlic powder, smoked paprika, salt, and black pepper.
Spread the seasoned sweet potatoes in a single layer on a large baking sheet.
Roast for 25–30 minutes, turning halfway through, until golden on the edges and fork-tender.
Meanwhile, heat a large skillet over medium-high heat. Add the ground beef and break it into small crumbles.
Cook the beef for approximately 7–9 minutes until browned and thoroughly cooked to 160°F (71°C). Drain excess fat if necessary.
Add garlic powder, onion powder, smoked paprika, Worcestershire sauce, salt, black pepper, and water. Stir and cook for another 1–2 minutes.
In a small bowl, whisk together Greek yogurt, ketchup, mustard, pickle juice, garlic powder, smoked paprika, and black pepper until smooth.
Prepare the lettuce, tomatoes, red onion, and dill pickles.
Divide the roasted sweet potatoes between four bowls. Add the seasoned ground beef and shredded cheddar.
Arrange the lettuce, tomatoes, red onion, and pickles over each serving.
Drizzle with creamy burger sauce and serve immediately.