This page lists the versions for various kde software, and the reddit discussion about the releases.

Package Repology Link (Lists package versions for every Distro)
plasma-desktop https://repology.org/metapackage/plasma-desktop/versions
plasma-framework https://repology.org/metapackage/plasma-framework/versions
dolphin (KDE Apps) https://repology.org/metapackage/dolphin/versions
qt5 https://repology.org/metapackage/qt5/versions

Plasma

https://community.kde.org/Schedules/Plasma_5

Version /r/kde Thread Other Threads
Plasma 5.23.0 /r/kde /r/kde (video discussion) /r/linux (blog post)
Plasma 5.22.0 /r/kde /r/linux (blog post) HackerNews
Plasma 5.21.0 /r/kde /r/kde (blog post) /r/kde (video discussion) /r/linux (blog post)
Plasma 5.21.0 Beta /r/kde /r/linux
Plasma 5.20.0 /r/kde /r/linux HackerNews
Plasma 5.20.0 Beta /r/kde /r/linux
Plasma 5.19.5 /r/kde /r/linux
Plasma 5.19.4 /r/kde /r/linux
Plasma 5.19.3 /r/kde /r/linux
Plasma 5.19.2 /r/kde /r/linux
Plasma 5.19.1 /r/kde /r/linux
Plasma 5.19.0 /r/kde /r/linux
Plasma 5.19.0 Beta /r/kde /r/linux
Plasma 5.18.5 /r/kde /r/linux
Plasma 5.18.4 /r/kde /r/linux
Plasma 5.18.3 /r/kde /r/linux
Plasma 5.18.2 /r/kde /r/linux
Plasma 5.18.1 /r/kde /r/linux
Plasma 5.18.0 /r/kde /r/linux HackerNews
Plasma 5.18.0 Beta /r/kde /r/linux
Plasma 5.17.5 /r/kde /r/linux
Plasma 5.17.4 /r/kde /r/linux
Plasma 5.17.3 /r/kde /r/linux
Plasma 5.17.2 /r/kde /r/linux
Plasma 5.17.1 /r/kde /r/linux
Plasma 5.17.0 /r/kde /r/linux
Plasma 5.17.0 Beta /r/kde /r/linux
Plasma 5.16.5 /r/kde /r/linux
Plasma 5.16.4 /r/kde /r/linux
Plasma 5.16.3 /r/kde /r/linux
Plasma 5.16.2 /r/kde /r/linux
Plasma 5.16.1 /r/kde /r/linux
Plasma 5.16.0 /r/kde /r/linux
Plasma 5.16.0 Beta /r/kde /r/linux
Plasma 5.15.5 /r/kde /r/linux
Plasma 5.15.4 /r/kde /r/linux
Plasma 5.15.3 /r/kde /r/linux
Plasma 5.15.2 /r/kde /r/linux
Plasma 5.15.1 /r/kde /r/linux
Plasma 5.15.0 /r/kde /r/linux /r/opensource
Plasma 5.15.0 Beta /r/kde /r/kde Neon Help Test /r/linux
Plasma 5.14.5 /r/kde /r/linux
Plasma 5.14.4 /r/kde /r/linux
Plasma 5.14.3 /r/kde /r/linux
Plasma 5.14.2 /r/kde /r/linux
Plasma 5.14.1 /r/kde /r/linux /r/openSUSE
Plasma 5.14.0 /r/kde /r/kde thread #2 /r/linux /r/openSUSE
Plasma 5.14.0 Beta /r/kde /r/linux
Plasma 5.13.5 /r/kde /r/linux
Plasma 5.13.4 /r/kde /r/linux
Plasma 5.13.3 /r/kde /r/linux
Plasma 5.13.2 /r/kde /r/linux
Plasma 5.13.1 /r/kde /r/linux
Plasma 5.13.0 /r/kde /r/linux /r/kdeneon
Plasma 5.13.0 Beta /r/kde /r/linux
Plasma 5.12.4 /r/kde /r/linux
Plasma 5.12.4 /r/kde /r/linux
Plasma 5.12.3 /r/kde /r/linux
Plasma 5.12.2 /r/kde /r/linux
Plasma 5.12.1 /r/kde /r/linux
Plasma 5.12.0 /r/kde /r/kde bug thread /r/linux /r/linux thread #2 /r/linuxmasterrace /r/linuxunplugged
Plasma 5.12.0 Beta /r/kde /r/linux
Plasma 5.11.5 /r/kde /r/linux
Plasma 5.11.4 /r/kde /r/linux
Plasma 5.11.3 /r/kde /r/linux
Plasma 5.11.2 /r/kde /r/linux
Plasma 5.11.1 /r/kde /r/linux /r/linuxmasterrace
Plasma 5.11.0 /r/kde /r/linux /r/Kubuntu
Plasma 5.11.0 Beta /r/kde /r/linux /r/linuxmasterrace
Plasma 5.10.5 /r/kde /r/linux
Plasma 5.10.4 /r/kde /r/linux
Plasma 5.10.3 /r/kde /r/linux
Plasma 5.10.2 /r/kde /r/linux
Plasma 5.10.1 /r/kde /r/linux
Plasma 5.10.0 /r/kde /r/linux /r/linuxmasterrace
Plasma 5.10.0 Beta /r/kde /r/linux
Plasma 5.9.5 /r/kde /r/linux
Plasma 5.9.4 /r/kde /r/linux
Plasma 5.9.3 /r/kde /r/linux
Plasma 5.9.2 /r/kde /r/linux
Plasma 5.9.1 /r/kde /r/linux
Plasma 5.9.0 /r/kde /r/linux
Plasma 5.9.0 Beta /r/kde /r/linux
Plasma 5.8.5 /r/kde /r/linux
Plasma 5.8.4 /r/kde /r/linux
Plasma 5.8.3 /r/kde /r/linux
Plasma 5.8.2 /r/kde /r/linux
Plasma 5.8.1 /r/kde /r/linux
Plasma 5.8.0 /r/kde /r/linux
Plasma 5.8.0 Beta /r/kde /r/linux

KDE Frameworks

Version /r/kde Thread Other Threads
KDE Frameworks 5.63.0 /r/kde /r/linux
KDE Frameworks 5.62.0 /r/kde /r/linux