In a large skillet, heat the olive oil over medium heat. Add the diced red bell pepper, jalapeño, and red onion. Sauté for about 5-7 minutes until the vegetables are softened.
Stir in the cooked shredded chicken, diced pineapple, ground cumin, smoked paprika, lime juice, salt, and pepper. Cook for another 5-6 minutes, allowing the flavors to meld and the mixture to become heated through.
While the chicken mixture is cooking, warm the corn tortillas in a separate dry skillet over medium heat for about 30 seconds on each side until pliable.
Assemble the tacos by placing a generous spoonful of the spicy pineapple chicken mixture in the center of each tortilla. Top with fresh cilantro.
Serve the tacos immediately with lime wedges on the side for squeezing over the top.