Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the chicken breast and sweet potato into 1/2-inch cubes, and rinse and pat the chickpeas completely dry with a paper towel.
Place the chicken, sweet potatoes, and chickpeas on the baking sheet, then drizzle with olive oil and sprinkle with sea salt, black pepper, smoked paprika, and garlic powder.
Toss everything until evenly coated and spread into a single layer, ensuring enough space for the chickpeas to crisp up.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the sweet potatoes are tender.
While the tray roasts, place the chopped kale in a large bowl and massage it with the lemon juice for 1 minute until it becomes dark green and tender.
Add the warm roasted chicken, potatoes, and chickpeas to the kale bowl and toss well before serving.