Add 2 cups fine blanched almond flour, ½ cup tapioca starch, ¼ cup coconut flour, ¼ teaspoon sea salt, ½ cup coconut sugar, 1 teaspoon ground cinnamon, 1 teaspoon pumpkin pie spice, and 1 ½ teaspoons fresh baking soda to medium mixing bowl.
Whisk ingredients together until well blended, with no lumps remaining. Set bowl aside.
Place ½ cup refined coconut oil in small microwave-safe bowl. Place bowl in microwave and heat oil in 15-second increments, stirring between each, until oil is melted. Carefully remove bowl from microwave and set aside. Let oil cool until no longer hot, but not cool enough to solidify again.
While oil cools, crack 3 large eggs into large mixing bowl. Lightly whisk eggs until well combined. Add cooled oil to large bowl with beaten eggs, followed by ¼ cup unsweetened almond milk, 2 teaspoons pure vanilla extract, and 1 cup canned pumpkin purée.
Slowly add dry ingredients to bowl of wet ingredients in small increments, gently whisking between each addition to just incorporate dry ingredients into wet. Continue until all wet and dry ingredients are fully combined into muffin batter. Be careful not overmix batter or muffins will be dense.