My question is if the camera dont have the reset button how can we reset it

Hikvision and HiLook cameras can be reset by generating a reset file using the SADP software tool. This file is sent to us or Hikvision direct and you will receive a file in return that can be uploaded to reset the device. For more information see this article. https://connectec.uk/blog/how-to-reset-the-password-of-a-hikvision-or-hilook-device