**Season the Chicken:**
- Season the chicken with garlic powder, onion powder, smoked paprika, thyme, salt, and black pepper.
**Sear the Chicken:**
- Heat olive oil in a large skillet or Dutch oven over medium-high heat. Add the chicken and sear for 3–4 minutes per side until golden brown. Remove the chicken and set it aside (it will finish cooking later).
**Sauté Aromatics:**
- In the same skillet, add the diced onion and garlic. Sauté for 2–3 minutes until softened and fragrant.
**Add the Rice:**
- Stir in the rice and toast for 1–2 minutes to enhance its flavor.
**Incorporate Liquids:**
- Pour in the chicken broth and milk, stirring to combine. Add parsley, paprika, and black pepper.
**Simmer with Chicken:**
- Return the seared chicken to the skillet, nestling it into the rice mixture. Bring to a gentle simmer, then reduce the heat to low. Cover and cook for 20–25 minutes, stirring occasionally, until the rice is tender and the chicken is cooked through.
**Add Parmesan (Optional):**
- Stir in the Parmesan cheese for extra creaminess and flavor.
**Serve:**
- Garnish with fresh parsley and serve warm.