Heat oven to 350°F/175°C. Line a 9 x 9-inch/23 x 23 cm baking pan with parchment paper.
Mix the almond flour, cassava or coconut flour, coconut oil, maple syrup, and salt in a bowl until a dough forms. Press evenly into the prepared pan. Prick with a fork.
Bake until lightly set, about 10 minutes. Remove and let cool.
Whisk pumpkin puree, coconut milk, maple syrup, coconut sugar, eggs, tapioca flour, vanilla, pumpkin pie spice, cinnamon, and salt until smooth. Pour over the crust.
Bake until the center is set and no longer jiggles, 45 to 50 minutes. Cool completely in the pan. Refrigerate for at least 2 hours or overnight.
Slice into bars. Serve chilled or at room temperature.
Keep refrigerated in an airtight container for up to 1 week.