Toast the coconut flakes in a 20 cm / 8-inch skillet over medium heat for 2 to 3 minutes, stirring often, until golden. Transfer to a plate to cool.
In a small bowl, whisk the matcha powder with the warm water until smooth with no clumps remaining.
In a mixing bowl, stir together the coconut yogurt, maple syrup, and vanilla extract until combined.
Scoop half the yogurt mixture into a separate bowl and set aside, this will be your plain layer.
Whisk the matcha paste into the remaining yogurt mixture until you get an even green color, this is your matcha layer.
Spoon a layer of plain yogurt into the bottom of each of 4 jars or cups, dividing evenly.
Add a spoonful of granola on top of the plain yogurt in each cup.
Spoon the matcha yogurt over the granola, dividing evenly among the 4 cups.
Top each cup with diced mango, toasted coconut flakes, and a sprinkle of chia seeds.
Cover and chill for at least 10 minutes before serving, or store up to 2 days.