Marinate the chicken: In a bowl, whisk olive oil, lemon zest and juice, garlic, oregano, salt, pepper, and paprika.
Add chicken and toss to coat. Cover and refrigerate for at least 30 minutes, up to 8 hours.
Cook the rice: Prepare rice according to package directions. Fluff with a fork and keep warm.
For extra flavor, stir in a squeeze of lemon and a drizzle of olive oil.
Make the tzatziki: Grate the cucumber on the large holes of a grater, then squeeze out excess water with a clean towel. In a bowl, combine yogurt, cucumber, olive oil, lemon juice, garlic, dill, and salt. Adjust salt and lemon to taste.
Chill until serving.
Prep the toppings: Halve tomatoes, dice cucumber, thinly slice red onion, chop herbs, and crumble feta. Set aside.
Cook the chicken: Heat a large skillet or grill pan over medium-high. Lightly oil the surface.
Cook chicken 5–6 minutes per side (thighs) or 4–5 minutes per side (breasts), until browned and cooked through. Internal temperature should reach 165°F (74°C). Rest 5 minutes, then slice.
Assemble the bowls: Add a scoop of rice to each bowl.
Top with sliced chicken, a generous dollop of tzatziki, tomatoes, cucumber, red onion, olives, and feta. Finish with fresh herbs and a squeeze of lemon.
Taste and tweak: Add a pinch of salt, extra tzatziki, or a drizzle of olive oil if needed. Serve warm with lemon wedges.