Sprinkle the gelatin on some of the coconut milk in a small bowl. Let sit for 5 minutes to fully bloom (hydrate) the gelatin.
Warm remaining coconut milk and maple syrup in a small to medium saucepan, just until dissolved.
Stir in bloomed gelatin until fully dissolved.
Let cool a few minutes (warm, not hot).
Add lemon juice and zest. Taste test.
Chill for 30 minutes uncovered, then cover and refrigerate for 2 hours or more.
Before serving, garnish with colorful citrus zest, shredded coconut, whipped cream, chopped and/or candied nuts or berries, or edible flowers.
Blueberry Compote Topping
Combine the berries and water in a small saucepan. Heat over medium low heat just until the berries burst.
Add the lemon zest and salt. Taste and add the maple syrup if needed. Add lemon juice and set aside to cool for at least an hour.
Refrigerate until ready to use on top of the panna cotta.
Add a bit more maple syrup, or a bit of liquid stevia or stevia extract, a little at a time, tasting between each addition.
Notes
If using an alternative sweetener to maple syrup or honey, keep in mind that maple syrup and honey are sweeter than sugar. More information is in this post on baking with honey.