Preheat the oven to 400°F (200°C).
Toss the cubed sweet potato with 1/2 tablespoon of the olive oil and spread in a single layer on a baking sheet.
Roast the sweet potato for 20–30 minutes, or until fork-tender, stirring or flipping once for even browning.
In a small bowl, combine cumin, garlic powder, onion powder, chipotle chili powder, smoked paprika, and a pinch of sea salt.
Pat the chicken breast dry and rub the spice mixture evenly over both sides.
Heat the remaining 1/2 tablespoon of olive oil in a medium oven-safe skillet over high heat.
Sear the chicken 1 minute per side until golden, then transfer the skillet to the preheated oven and bake 15–20 minutes, or until the internal temperature reaches 165°F (74°C).
While the chicken and potatoes cook, place the BBQ sauce and sliced dates in a microwave-safe bowl and heat about 1 minute until hot.
Transfer the hot sauce and dates to a small food processor and pulse until the dates are mostly broken down, leaving a few small chunks; scrape down the sides as needed.
Stir together the pineapple, cilantro, minced red onion, and juice of half a lime to make the pineapple salsa.
Dice the cooked chicken and divide it between two bowls. Add the roasted sweet potato and spoon over pineapple salsa and the warmed BBQ-date sauce.
Top each bowl with diced avocado and additional lime juice to taste, then serve.