Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking pan or line it with parchment paper.
In a large bowl, whisk together the almond flour, coconut flour, golden sweetener, baking powder, pumpkin pie spice and salt until evenly combined.
In a separate bowl, whisk the pumpkin puree, melted butter, eggs and vanilla extract until smooth. Pour the wet ingredients into the dry ingredients and stir until a thick, even batter forms.
Spread the batter in the prepared pan and smooth the top. Bake for 28-32 minutes, until the center springs back and a toothpick comes out clean. If the top browns too quickly, cover it loosely with foil for the last 10 minutes. Cool completely in the pan.
For the cinnamon cream, beat the cream cheese and powdered sweetener until completely smooth. With the mixer on low, gradually pour in the cold heavy cream, then add the vanilla extract and cinnamon.Increase the speed to high and whip for 2-3 minutes until stiff peaks form.
Spread the cream over the cooled cake in a thick, swirly layer. Sprinkle with the toasted pecans and a dusting of cinnamon, then chill for at least 1 hour before cutting into squares.