ISO does not approve any management system, they are the body that creates standards and this is what say about themselves:

ISO is an independent, non-governmental international organisation with a membership of 164 national standards bodies.

Through its members, it brings together experts to share knowledge and develop voluntary, consensus-based, market relevant International Standards that support innovation and provide solutions to global challenges.

ZEBSOFT will provide for all the requirements set out in ISO standards the content is yours.