The chart icon is only there when there is something to chart. A post that has not gone out yet does not show it, and on X it is hidden as well when the install has X analytics turned off. When she has the post but not the link back to the published version, the same icon opens Connect Post instead, where you pick the matching post from the platform, and she goes straight to the statistics once you save.
Super admins get one extra icon on the strip, which opens a small dialog with two buttons: Copy post id and Copy Debug JSON.