Scoop the chocolate ice cream into the chocolate graham pie shell and spread into an even layer.
Scatter half the pecans over the ice cream and drizzle over half of the caramel and chocolate sauces. Place in the freezer to harden for a couple hours. Place the drained cherries on a sheet pan lined with parchment paper and place in the freezer alongside the pie.
Remove the pie from the freezer and spread the dulce de leche ice cream over the top, smoothing the surface. Add the remaining pecans and drizzle the remaining caramel and chocolate sauces, in thin crisscrossing lines, over the top of the pie, making sure not to cover it completely. Squirt about 16 small mounds of whipped cream around the circumference of the pie. Place a frozen cherry on each mound of whipped cream. Transfer to the freezer to harden, 2 to 3 hours minimum. (Can be made up to a week in advance, just cover tightly once it has hardened.)
When ready to serve, use a warm knife to cut into neat slices. Enjoy.