Preheat the oven to 350F and line a large baking sheet with parchment paper.
In the bowl of a stand mixer, sift the almond and coconut flours. Add the honey, egg, 3 tablespoons almond milk, butter, lemon zest, baking soda, and salt to the flours. Using the mixer attachment, mix until a loose dough forms and gently fold in the blueberries.
Using a biscuit cutter, fill it with ½ to ¾-inch of dough. Press it down with your hands to form the scone and lift the cutter, so the dough releases. Repeat with remaining dough.
Brush scones with the remaining tablespoon of almond milk.
Bake for 18-20 minutes until golden brown. Allow them to cool down prior to eating.
Store leftovers in an airtight container for up to 2 days.