Preheat the oven to 375°F (190°C).
In a large oven-safe skillet, heat olive oil over medium heat.
Season the chicken thighs with salt and pepper, then place them skin-side down in the skillet.
Sear the chicken for about 5-7 minutes until golden brown, then flip and sear the other side for 3-4 minutes.
Remove the chicken from the skillet and set aside. In the same skillet, add the diced onions and garlic, sauté until softened.
Add rice to the skillet with onions and garlic, stirring for about 2 minutes until slightly translucent.
Pour in the chicken broth and BBQ sauce, stirring to combine, then return the chicken to the skillet, skin-side up.
Cover the skillet with a lid and transfer it to the preheated oven; bake for 25-30 minutes.
After baking, remove the skillet from the oven and let it rest for 5 minutes before serving.
Serve warm, garnished with chopped herbs if desired.