Preheat your oven to 400℉.
Season and roast the sweet potatoes. Place the sweet potatoes on a large baking sheet lined with parchment paper. Drizzle 1 tablespoon over them and sprinkle the garlic powder, onion powder, smoked paprika, kosher salt, and pepper over top. Mix together to evenly coat the sweet potatoes. Lay them cut-side down and roast them in a 400°F oven for 30-40 minutes until fork-tender and lightly golden brown.
Season and roast the chickpeas. Dump the rinsed, drained, and dried chickpeas on a separate medium baking sheet lined with parchment paper. Drizzle with 1 tablespoon olive oil and sprinkle with za’atar, cayenne powder, and garlic powder. Mix together until evenly coated. Roast in the oven alongside the sweet potatoes for 20-30 minutes, shaking the pan a few times throughout.
Make the dressing. In a small bowl, whisk together the chopped parsley, lemon juice, Greek yogurt, olive oil, honey, and kosher salt.
Combine the chopped cucumber, tomatoes, and feta. While the sweet potatoes and chickpeas are roasting, combine the chopped cucumber, tomatoes, and cubed feta in a large bowl.
Toss the cucumber mixture together with the dressing. Pour the dressing over the cucumber mixture and combine.
To serve - top the sweet potatoes with the roasted chickpeas, and dressed chopped cucumber mixture.