Place the blueberries, 2 tablespoons water, and 1 tablespoon maple syrup (or honey/brown sugar) in a small saucepan and heat over low–medium heat.
Cook the blueberries, stirring occasionally, until they release their juices and become soft and slightly puffy, about 8–10 minutes; remove from heat and set aside.
In a mixing bowl, whisk together 1 cup vanilla Greek yogurt, 1 large egg, and 1 tablespoon maple syrup until smooth; if the yogurt is very thick, add a little milk or water to reach pancake-batter consistency.
Add 1 cup gluten-free all-purpose flour, 1/4 teaspoon baking soda, and a dash of salt to the wet ingredients and stir just until combined; do not overmix.
Heat a skillet or griddle over medium-high heat and lightly grease to coat the surface.
Pour a scant 1/4 cup of batter per pancake onto the hot skillet and cook until the edges begin to set and bubbles form on the surface, about 2–3 minutes.
Flip and cook the other side until golden and cooked through, another 2–3 minutes; repeat with remaining batter.
Serve pancakes topped with the cooked blueberries and additional maple syrup if desired.