If you wish to unlink a HUAWEI kids watch from your phone, you'll need to unlink the watch admin account that has been logged in to on the phone from the watch.

Unlinking the main admin account from the kids watch

You can unlink the main admin account from the kids watch via the HUAWEI FamCare app.

Main admin: Open the HUAWEI FamCare app, and go to Devices > More > Unlink.

If the kids watch has been linked to both the main admin account and normal admin account(s), the main admin will need to transfer the permissions to another admin before performing the unlinking operation. (To transfer the permissions of the main admin account, open the HUAWEI FamCare app, go to Devices > More > Admins, touch and hold a normal admin in the list, and select Transfer permissions.)

If there are no other admins, the kids watch will be automatically restored to its factory settings and restarted after being unlinked from the main admin.

Unlinking a normal admin account from the kids watch

A normal admin account can be unlinked from the kids watch by the normal admin themselves in the HUAWEI FamCare app, or by being removed from the HUAWEI FamCare app by the main admin.

Unlinking the kids watch in the HUAWEI FamCare app as a normal admin
Open the HUAWEI FamCare app, and go to Devices > More > Unlink.
Removing a normal admin as the main admin
Open the HUAWEI FamCare app, go to Devices > More > Admins, touch and hold the admin in question, and touch Remove.