In a large bowl, stir together the cassava flour, starch, tigernut flour, coconut flour, collagen powder, cinnamon, baking soda, and salt.
Add the oil and maple syrup and stir to combine.
Stir in the entire can of coconut milk (plus an entire can filled with water) and vinegar, whisking until fully combined. Stir in the vanilla extract. The batter will be lumpy at first but will eventually be smooth, fluffy, and very thick.
Preheat the waffle iron and coat with oil.
Place a ladle full of batter in the center of the waffle iron. Close and cook per the manufacturer's instructions until the waffle is golden brown. Use a fork to gently remove the waffle. Repeat with remaining batter.
To serve the waffles, top with whipped coconut cream and maple syrup warmed with frozen or fresh mixed berries.