In a cold bowl, add the cold aquafaba and cream of tartar. Using an electric whisk, whip the mixture until the liquid turns into stiff peaks. You can do this by hand too, but it will take a long time. Set aside.
In a bowl, add the flour, salt, sugar, and mix well.
Add the vanilla, oil, plain yogurt, apple cider vinegar, and mix to form a smooth batter. If the mixture is thick, loosen it with some vegan milk or water.
Add the whipped aquafaba and gently fold into the batter using the cut and fold method. Be sure no to whisk vigorously: that will cause the air bubbles to deflate.
Heat some oil or vegan butter in a nonstick pan. Pour a ladle (or two) of the batter on the pan. Add some blueberries all over the top of the pancake batter (while it is still wet and uncooked).
Cover and cook on medium heat until you start to see bubbles all over the top. Then flip, press gently, and cook for a minute or two.
Once the pancakes are done, stack them onto a plate. Keep them in a warm oven (at the lowest temperature possible) while you continue to make the rest of the batter, so that all your pancakes stay warm.
Top off the pancakes with some maple syrup or agave, or some fresh vegan whipped cream and more blueberries. Enjoy warm.