An updated qt5 in CentOS Stream 8 allowed us to update KDE Plasma Desktop. I believe everything is in place and ready for use and/or testing.
This is for CentOS Stream 8 only, at this time.
===How to Install [1] = Install epel-release dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm = Enable PowerTools dnf config-manager --enable powertools = Install KDE dnf group install kde-desktop-environment or dnf group install kde-desktop (Optional) dnf group install kde-apps (Optional) dnf group install kde-media (Optional) dnf group install kde-education (Optional) dnf install okular (Optional) dnf group install kde-software-development (Optional) dnf group install kf5-software-development
=== KNOWN PACKAGE ISSUES
== UNINSTALLABLE PACKAGES * kaccounts-providers - no signon-ui * kigo - no gnugo * lokalize - no translate-toolkit , needs rebuilding on python3
== UNBUILT PACKAGES * polkit-qt5 - need branch and build of polkit-qt-1 * kde-gtk-config - needs sassc * digikam - can't find opencv despite it being installed
== UN-UPDATED PACKAGES (but still install and run) * kpmcore - would need a newer util-linux than available in RHEL 8 * kde-partitionmanager - would need a newer kpmcore
Feel free to install and test. Troy Dawson
[1] - https://fedoraproject.org/wiki/SIGs/KDE/EPEL#Installation