Rinse rice and combine with chicken broth in a saucepan; bring to a boil, then reduce heat, cover, and simmer for 15-18 minutes until liquid is absorbed.
Heat olive oil in a large skillet over medium-high heat.
Add ground turkey to the skillet and cook, breaking it apart with a spatula, until browned and fully cooked through, approximately 8 minutes.
Stir in dried oregano, garlic powder, onion powder, salt, and black pepper; sauté for 1 additional minute to incorporate flavors.
In a separate small bowl, toss the diced cucumber, halved cherry tomatoes, and sliced red onion with lemon juice.
Divide the cooked rice evenly into four serving bowls.
Layer the seasoned turkey over the rice in each bowl.
Add the prepared vegetable mixture, kalamata olives, and crumbled feta cheese to the bowls.
Top each serving with a dollop of tzatziki sauce before serving.