Method 1:

Go to HUAWEI ID > Devices, and select the device you want to delete. On the Device information screen, touch the three-dot menu in the upper right corner, and touch Delete. This will log out of your account on this device and cause the device to be removed from the list of trusted devices. (Note that the current device won't be logged out this way.)

Method 2:

After changing your password, the "Log out other devices" message will be displayed. Touching Yes will log out of your account from all the other devices or website browsers. You need to enter your new password to log in again.