helpdesk tab of dashboard not showing for site restricted technician

we are trying to set up a site specific help desk where that sites technicians respond to that site's users. we have configured the user roles, assigned the site to the technician.

when the technician logs in they see only their site tickets, so this works fine

however, on the dashboard view, they only see the Change tab (part of the 'Problem and Change' tab), as they do not have problem access, and they do not see the 'Assets' tab as they do not have access to Asset - this is good behavior so far.

why do they not see the 'Helpdesk' tab?

they have Full Control on Requests, Full Control on Changes, Solutions and Reports, and all boxes in the requests portion of advanced permissions are checked. Their 'allowed to view' is set to 'All in associated sites' and they are associated with that site

/kdl