No-Bake Fruity Pebbles Cheesecake

For the crust:

Nilla Wafer crumbs

unsalted butter

For the filling:

(2 pkgs) cream cheese, softened

plus 2 tablespoons heavy whipping cream, divided

Fruity Pebbles cereal, divided

granulated sugar

powdered sugar

For the topping:

heavy whipping cream

powdered sugar