Your repo list showed only KDE:Extra present? I have
1 | KDE-Applications | KDE-Applications | Yes | (r ) Yes | Yes | - | 75 | rpm-md | https://download.opensuse.org/repositories/KDE:/Applications/KDE_Frameworks5_openSUSE_Leap_16.0 |
2 | KDE-Extra | KDE-Extra | Yes | (r ) Yes | Yes | - | 75 | rpm-md | https://download.opensuse.org/repositories/KDE:/Extra/KDE_Applications_openSUSE_Leap_16.0 |
3 | KDE-Frameworks | KDE-Frameworks | Yes | (r ) Yes | Yes | - | 74 | rpm-md | https://download.opensuse.org/repositories/KDE:/Frameworks/openSUSE_Leap_16.0 |
4 | KDE-Qt6 | KDE-Qt6 | Yes | (r ) Yes | Yes | - | 74 | rpm-md | https://download.opensuse.org/repositories/KDE:/Qt6/openSUSE_Leap_16.0
~> kinfo
Operating System: openSUSE Leap 16.0
KDE Plasma Version: 6.5.0
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.12.0-160000.5-default (64-bit)