If you have questions about using mojoPortal, you can post them here.
You may want to first review our site administration documentation to see if your question is answered there.
I have "Enable Content Workflow" turned on for the site and the approve/reject/publish buttons show up nicely for most of the modules with one exception: module that's marked as "Global".
Is there a way to make the workflow buttons also show up for Global modules?
Global Content is only editable by Administrators, Content Administrators and users in roles which are explicitly set on the Edit Roles for the module itself. Page Permissions do not apply to Global Content.
See this documentation for further explanation.