Apple - Seeing All Icons on the Menu Bar

• Finder has a relatively short app menu, so activating Finder is a quick way to see more menu bar icons. (And the built-in Maps app has an even shorter app menu.)
• Bartender collapses the menu bar items into a submenu, which will let you see more of them (without being hidden by app menus).

AccessMenuBar solves that problem.

App menus take precedence over menu bar items. In this case, whatever your foreground app is, it's menu options are too long, causing Window and Help to hide the menu bar items that would otherwise occupy that space. To see more menu bar items, use an app with a shorter menu list, or increase your screen resolution.