Prepare the Dough:

1. 1. In a large bowl, combine flour, sugar, salt, and yeast.
   2. Add warmed pineapple juice and milk, eggs, and melted butter.
   3. Mix until a soft dough forms. Knead for about 5-7 minutes until smooth.
   4. Place dough in a greased bowl, cover, and let rise in a warm place for 1 hour or until doubled in size.

Prepare the Filling:

1. 1. In a medium bowl, mix brown sugar, cinnamon, and coconut flakes.
   2. On a floured surface, roll out the dough into a 16×12-inch rectangle.
   3. Spread softened butter evenly over the dough.
   4. Sprinkle the sugar-cinnamon-coconut mixture over the buttered dough.

Shape the Rolls:

1. 1. Starting from the long edge, tightly roll up the dough into a log.
   2. Cut into 12 even slices and place them in a greased 9×13-inch baking dish.
   3. Cover and let rise for another 30 minutes.

Bake:

1. 1. Preheat the oven to 350°F (175°C).
   2. Bake the rolls for 20-25 minutes, or until golden brown.

Glaze:

1. 1. In a bowl, whisk together powdered sugar, coconut milk, and vanilla extract until smooth.
   2. Drizzle the glaze over the warm rolls.
   3. Top with crushed pineapple if desired.