Preheat the grill or a grill pan over medium-high heat.
In a small bowl, mix together olive oil, smoked paprika, garlic powder, onion powder, cumin, chili powder, salt, and pepper to create the marinade.
Coat the chicken breasts with the marinade, ensuring they are evenly covered. Let the chicken marinate for at least 10 minutes.
While the chicken is marinating, steam or blanch the broccoli florets until tender, about 4-5 minutes. Set aside.
For the guac rice, in a bowl, mix the cooked rice with mashed avocado, lime juice, and cilantro until well combined. Set aside.
Grill the marinated chicken breasts for 5-7 minutes per side or until fully cooked and internal temperature reaches 165°F (74°C).
Slice the grilled chicken into strips.
To assemble the bowls, divide the guac rice, broccoli, and cucumber slices into bowls. Top with the grilled chicken strips.
Garnish with lime wedges and additional cilantro if desired. Serve immediately.