In a large pot, heat the olive oil over medium heat. Season the cubed chicken with salt, pepper, garlic powder, onion powder, and smoked paprika. Add the chicken to the pot and cook until browned on all sides, about 5-7 minutes.
Once the chicken is cooked through, add the orzo pasta to the pot and stir to combine.
Pour the chicken broth into the pot, stirring well. Bring to a gentle boil, then reduce the heat to a simmer. Cover and cook for about 10 minutes, stirring occasionally, until the orzo is nearly tender.
Add the broccoli florets to the pot and stir. Cover again and cook for another 3-5 minutes, or until the broccoli is tender and the orzo has absorbed most of the liquid.
Remove the pot from heat and stir in the grated Parmesan cheese and lemon juice. Mix well until the cheese is melted and the dish is creamy.
Taste and adjust seasoning if needed, then garnish with fresh chopped parsley before serving.