If I would need to guess I would say you've added the global menu widget to the taskbar. That would hide the "regular" menu bar in the applications. Removing th

If I would need to guess I would say you've added the global menu widget to the taskbar. That would hide the "regular" menu bar in the applications. Removing the global menu widget should bring back the "regular" menu in the application windows. OTOH, who really needs a menu bar? You can have nowadays a "command palette" like app menu in KRunner. Much better usability than remembering or searching a menu structure imho—in case you don't need the discoverability of a menu, of course.