In V6, "Search & Reporting" App - the menu-bar contains an "Activity" drop-down (far right next to "help"), if we are logged in as Administrator then within the "Activity" drop-down is "System Activity", otherwise it just contains "Jobs" and "Triggered Alerts"
The ability to access the Sub-Menu "Activity" (which contains essentially a great subset of the deployment-monitor/SOS apps) is only visible for the Admin user, what role-permission(s) or tweaks do we need to set on other roles (without inheriting admin directly) should we set to make that sub-menu visible please?
The "System Activity" link points to the status_index view in the search app, which by default is only visible for the admin role. You can of course change that and add other roles - make sure to make all linked pages visible as well though. Additionally, those views are going to look inside the _internal index, so that role must be able to search that as well.
Concerning #1 - as I've said in the answer, that role must be able to search the _internal index. If your role cannot do that then you need to allow that role to search it, or give the users a second role that does nothing other than allow them to search _internal.
Concerning #2 - yeah, the menu will not magically appear. However, you can drop a link to the status_index view in the regular navigation for your apps. They'll be able to use the view despite not being able to see the dropdown menu.