How to charge Apple Watch?

Here is a support article from Apple about how to charge an Apple Watch.

https://support.apple.com/guide/watch/charge-apple-watch-apd2b717523a/watchos

Unlike some other Apple products, the Apple Watch uses a special charger unique to the Apple Watch.

The Apple Watch comes with a circular magnetic charging cable with either a USB or USB-C connector at the other end, you use that cable with a compatible charging block to charge it.