Rinse and pat the chicken dry.
Coat the chicken evenly with the tropical seasoning blend.
Place the chicken in a large zip-top bag with lime zest, lime juice, cilantro, and olive oil.
Seal and refrigerate for at least 3 hours.
Meanwhile, prepare the tropical salsa by combining pineapple, kiwi, strawberries, mango, watermelon, jalapeño, cilantro, lime zest, lime juice, and seasoning in a large bowl. Mix gently until combined.
Heat a grill to 375°F (190°C).
Remove the chicken from the marinade and discard the remaining liquid.
Grill for about 5 minutes per side, or until the internal temperature reaches 165°F (74°C).
Let the chicken rest for several minutes before shredding.
Toss the shredded chicken with tamarind sauce.
Preheat the oven to 425°F (220°C).
Arrange tortilla chips in a single layer on a parchment-lined baking sheet.
Evenly distribute the shredded chicken over the chips.
Sprinkle Monterey Jack and cheddar cheese across the top.
Bake for about 5 minutes until the cheese is melted.
Garnish the Tropical Chicken Nachos with sliced jalapeños and fresh cilantro.
Serve immediately with the tropical salsa.