Add the pandan leaves and coconut water to a blender and blend until pandan juices come out. Strain through a fine-mesh sieve to extract the pandan liquid; set aside.
8-10 pandan leaves, 1 cup coconut water
In a medium saucepan over medium heat, add the coconut milk and bring to a gentle simmer. Stir in the palm sugar and cook until fully dissolved.
1 cup coconut milk, 1 Tbsp palm sugar
Remove from heat and stir in the strained pandan liquid and coconut syrup until well combined. Let the mixture cool.
½ cup coconut syrup
In a large mixing bowl, combine the young coconut, coconut jelly, pandan jelly, lychee, and tapioca pearls. Toss gently to distribute evenly.
2 cups shredded young coconut, 1 can nata de coco, 1 can pandan jelly, 1 can lychees, 1 cup tapioca pearls
Pour the cooled coconut sauce over the mixture and stir to combine.
Serve chilled by refrigerating for at least 1–2 hours before serving, or serve immediately over ice.