Coconut Chia Tapioca Pudding

Name: Coconut Chia-Tapioca Pudding
Ingredients: ½ cup large pearl tapioca (not instant or quick-cooking); 1 tablespoon white chia seeds; 2 13.5-ounce cans unsweetened coconut milk; ½ teaspoon kosher salt; ⅓ cup light agave nectar, plus more for serving; 1 cup chopped fresh coconut meat; ½ cup chopped fresh pineapple, plus more for serving; Sliced mango and toasted unsweetened shredded coconut (for serving)