Place the cashews, maple syrup, milk, lemon juice, vanilla, and salt into a blender or the bowl of a food processor fitted with an s-blade. Blend until smooth.
Open the cans of coconut cream and drain off the liquid. Transfer the remaining solid portion to a large mixing bowl.
Use an electric mixer at high speed to whip the coconut cream until light and fluffy, about 1 minute.
Add the cashew mixture to the bowl with the coconut cream. Fold in the cashew mixture using a spatula.
Place the espresso into a small bowl. Add the coffee liqueur, if using.
One at at time, dip half of the ladyfingers in the expresso mixture, then arrange them in the bottom of a 9 x 13 baking dish.
Spread half of the coconut cream mixture over the ladyfingers.
Dip each of the remaining ladyfingers in the espresso mixture, then arrange them over the coconut cream layer.
Spread the remaining coconut cream mixture over the top layer of ladyfingers.
Sprinkle the cinnamon (if using) over the coconut cream mixture, followed by the cocoa.
Cover the dish and refrigerate the tiramisu until set, about 4 hours.
Slice and serve.