Make the almond crumble: In a bowl, combine almond flour, melted butter, sweetener, cinnamon, and salt.
Stir until sandy and clumpy. Toast in a dry skillet over medium heat, stirring often, for 3–5 minutes until lightly golden and fragrant. Let cool.
Whip the cream for the mousse: In a cold mixing bowl, whip 1 cup heavy cream to soft peaks.
Set aside.
Blend the base: In another bowl, beat softened cream cheese with powdered sweetener, pumpkin puree, vanilla, pumpkin pie spice, extra cinnamon, and a pinch of salt until smooth and fluffy. No visible lumps.
Fold gently: Add one-third of the whipped cream to the pumpkin mixture and fold to lighten. Fold in the rest just until combined. Don’t overmix or you’ll deflate the mousse.
Make the topping: Whip the remaining 1/2 cup cream with 1 tbsp powdered sweetener and 1/2 tsp vanilla to soft peaks.
Keep chilled.
Assemble the parfaits: In small glasses or jars, add a spoonful of almond crumble. Layer pumpkin mousse on top. Repeat layers if your glasses are tall.
Finish with a dollop of whipped cream and a sprinkle of cinnamon or a few curls of dark chocolate.
Chill and serve: Refrigerate for 30–60 minutes to set. Serve cold and enjoy.