Kann man die Optionen der Benachrichtigungsleiste anpassen?

[nolo (Manuel)]

You could use Custom User Menu to show user options in it’s own menu and then just hide the tabs on the notifications menu entirely with

.user-menu.revamped {
  // target both desktop and mobile
  .menu-tabs-container, 
  .tabs-list { 
     display: none;
  }
}