DROP BOX ICON DISAPPEARED

I had the same problem. The Dropbox Icon disappearing from the Menu Bar, then reappearing, disappearing again, ...
I finally found out what was the issu. It is very simple, but still annoying if you don't know it:

I am also using a Macbook, OS Ventura.
In the upper right side of the screen there is the Finder Menu bar.
This menu bar contains the active App modules, like battery, WiFi, Bluetooth, VPN, Antivirus, Dropbox, etc.
The Dropbox App is always on the extreme left end of this Menu bar.
Apparently this Menu bar can only show a limited number of modules, due to limited screen space.
When the number of active modules is higher, the modules on the left side become invisible, though they are still active.
Unfortunately, the invisible Apps cannot be used, since you cannot click them.
So in order the see and use the Dropbox App, I had to disable some other Apps from the Menu Bar.
So it is more a Macbook issue than a Dropbox issue.