How can I recover forgotten Apple Watch activation lock password?

The Activation Lock password is your Apple Account password.

Unless you have proof of purchase or ownership, as explained in this related article, the official Apple Support can not disable the Activation Lock:

Additional Support - Activation Lock

If you have forgotten the Lock Screen passcode, you will have to reset the watch, as explained here:

If you forget your Apple Watch passcode - Apple Support

activation lock

is not a thing on the watch it's a theft protection on apples servers

it needs to

be removed About Activation

Lock on your Apple Watch - Apple Support

if you

don't know your appleID password If you have forgotten your Apple ID password – Apple Support (UK)

then you will

need the assistance of apple Activation

Lock - Support (apple.com)

and or

 Apple Support

And or

 Contact - Official Apple Support

and or

Genius Bar Reservation and Apple

Support Options - Apple