Continuo is a menu-bar-only app (LSUIElement). If you do not see the icon, the
app may still be running in the background. The steps below check that first,
then the usual macOS causes.
For what the icon and panel do when they are visible, see Menu bar.
Confirm the app is running
Open Activity Monitor and search for Continuo. If it is not listed, launch Continuo from Applications again.
Closing all windows does not quit Continuo. The menu bar item should stay.
Hidden behind the notch or by another app
On a MacBook with a notch, a crowded menu bar can leave the icon hidden under the camera housing. A menu bar manager app can also hide it. Hold ⌘ and drag other menu bar items to make room, or check the manager app’s hidden items.
Show menu bar icon setting
Settings → General → Show menu bar icon must be on. If you turned it off, open Continuo from Spotlight (⌘Space, type Continuo) to reach Settings and re-enable it.
Show Mac name next to icon, just below it (off by default), adds the name of the Mac you are sharing with beside the icon while one controls the other.
Padlock on the icon
A small padlock in the bottom-right corner of the Continuo icon means the pointer is locked to the Mac it is on. It also shows on a Mac you are controlling from another while that Mac holds the lock. It is not a different app or a warning. See Lock the pointer to one Mac.
Permissions not the cause
Missing Accessibility or Input Monitoring shows banners inside Continuo but does not hide the status item by itself. Fix permissions if control fails; see Permissions.
New macOS user account test
If the icon shows on one login account but not another, macOS menu bar state for that user may be at fault. Creating a fresh macOS user account on the same machine is a reliable isolation test.
Still invisible
Contact support with your macOS version, Mac model (notched or not), and whether Activity Monitor shows Continuo running.