In a large bowl, mix flour, baking powder, baking soda, cinnamon, pumpkin pie spice, ginger, and salt.
In another bowl, beat the whole eggs until frothy, then add pumpkin, melted butter, brown sugar, maple syrup, vanilla, and milk.
Mix until combined. Gradually add the dry ingredients to the wet mixture, stirring gently until just mixed—it's fine if some lumps remain.
Grease the waffle maker and pour in about 1/3 cup of batter for each waffle.
Cook for 5–6 minutes or until crisp, following your waffle maker’s instructions.
Transfer cooked waffles to the wire rack in the warm oven while cooking the remaining batter.
Toast pecans in a skillet over medium-low heat for 4–5 minutes, stirring constantly.
Once fragrant, lower the heat, add maple syrup, and warm through for a minute before removing from heat.