Pat chicken thighs dry and season both sides with salt, pepper, and paprika.
Heat olive oil in a large pot over medium-high heat and sear chicken skin-side down for 5–7 minutes until golden and crisp; flip and cook 4–5 minutes more. Remove chicken and set aside.
Reduce heat to medium, add chopped onion to pot, and cook 2–3 minutes, stirring and scraping browned bits.
Add minced garlic and sauté for 30–60 seconds until fragrant.
Stir in rinsed rice, coating it in the oil and aromatics; toast for about 1 minute, stirring frequently.
Pour in chicken broth, add dried thyme, salt, and pepper; stir and spread rice evenly.
Nestle seared chicken thighs on top, skin-side up, including any juices, and bring to a gentle boil.
Reduce heat to low, cover tightly, and simmer 25–30 minutes until rice is tender and chicken reaches 165°F.
In last 5 minutes, lift lid, scatter frozen peas over rice, cover, and cook until peas are heated through.
Remove from heat and let stand, covered, for 5 minutes to finish steaming.
Fluff rice with a fork gently; garnish with chopped fresh parsley and serve warm.