In a large mixing bowl, combine the pumpkin puree, softened cream cheese, powdered sugar, vanilla extract, cinnamon, nutmeg, and salt. Beat with an electric mixer until smooth and well combined.
In a separate bowl, whip the heavy cream until soft peaks form. Gradually add the maple syrup while continuing to whip until stiff peaks form.
Gently fold the whipped cream into the pumpkin mixture until fully combined.
In a trifle dish or individual serving glasses, layer the crushed graham crackers, followed by a layer of the pumpkin cheesecake mixture, then a layer of chopped pecans. Repeat the layers until all ingredients are used, finishing with a layer of whipped cream on top.
Drizzle caramel sauce over the top if desired.
Refrigerate the trifle for at least 2 hours before serving to allow the flavors to meld.