Add the mango juice and lemonade to a large pitcher.
Add the ice to the glasses and pour the lemonade mixture over the top.
Add 1 Tablespoon of dried dragonfruit to each glass.
If you want to add coconut milk, only fill the glasses 3/4 of the way full and then add 1/4 cup of the coconut milk.
Notes
Optional: Instead of dried dragonfruit, you can buy frozen dragonfruit and puree to make dragonfruit juice instead (you'll need 1/2 cup after straining it)