Originally Posted by
Rukbat Wait, you're plugging the watch into the phone? Or you're trying to charge the watch wirelessly? It doesn't work that way. Wireless charging only works if a device with a wireless charging receiver (like a Qi receiver) is placed on a charging pad. Tesla's "wireless power at a distance" never worked, and still doesn't.
The Mate 20 Pro can wirelessly charge other devices, place the watch on the back of the phone and try moving it around so you know where the coils are. Also note reverse wireless charging turns off automatically each time after charging a device so you have to manually turn it back on in settings before charging again.