Why is my Nintendo switch dock (official dock ) not working?

Woah woah. A clicking from the dock or switch? One can be very different to the other.

A switch clicking would mean something shorted out in the switch itself. You are screwed 😭 unless you know how to micro solder, in that case good for u :)

A dock clicking may be fixable by scurrying through the electronics and checking maybe a wire crossed over something or your USB-C port is gone.

HOWEVER make sure you unplug the battery (if working on switch) or charger (If working on dock) having them in will not only damage the troubled device further but also possible you.

Good luck mate