Add pineapple chunks, coconut milk, pineapple juice, maple syrup, and lime juice to your high-speed blender. If using chia seeds, add them now for extra nutrition.
Add ice cubes to the blender. For the smoothest consistency, blend on high speed for 45-60 seconds until completely smooth and frothy.
Taste and adjust sweetness with additional maple syrup or tartness with more lime juice as needed. Blend for another 15 seconds to incorporate.
If desired, rim glasses with toasted coconut flakes by dipping the rim in water then rolling in coconut. Fill glasses with fresh ice.
Pour the blended mocktail into prepared glasses, leaving room for garnish. Top with fresh pineapple slices and serve immediately with reusable straws.