Users assigned with an Admin, Fulfilment, or Consultant role have access to build templates. You can either build templates from scratch or, once it has been copied over to your local template library, modify a Mono template.
It is recommended that when building templates, certain criteria should be fulfilled, including that a template has been created with a specific business vertical in mind, it has been constructed after best practice for that specific vertical, and that global data tags have been included in the relevant pages and modules.
Read more about building templates and additional template acceptance criteria.