Assuming you are adding your food scraps every couple of days as you lift the moisture mat you will see the worms working just below the surface.
If your worms are not moving to the next tray, there could be a few reasons:
Try broadening your search.
Our composting worms are mixture of species (mainly reds and dendras) selected for their composting ability
The Urbalive Worm Composter is a home wormery kit that can be used indoors or outdoors for composting kitchen waste with the red worms. The perfect wormery for households, classrooms or offices.