You can easily find the modules in the Stratos Joomla template by navigating to the Joomla Admin Panel > Content > Site Modules. From here you can see the list of published and unpublished modules.

You can also access and use the modules that come with the SP Page Builder components. From the Site Modules, click on the “+New” button at the top left corner of the page. In the search bar write SP Page Builder to find the list of the modules of this component.