I would like to ask where I can find the switch user button?
I use Fedora 34 (with Plasma) 5.21
Thanks for reply!
The switch user functionality has been broken for some time and it was disabled in Fedora 34, see the blocker bug for details.
You can re-enable it by editing /usr/share/kde-settings/kde-profile/default/xdg/kdeglobals
and removing/commenting out the [KDE Action Restrictions]
section.
# HOW: https://develop.kde.org/deploy/kiosk/introduction/
# WHY: https://bugzilla.redhat.com/show_bug.cgi?id=1929643
[KDE Action Restrictions]
action/start_new_session=false
action/switch_user=false