If you start the recent KDE live iso and list there included kf5 packages, there are about 30 of them. To my understanding, none of them are needed for running the Plasma desktop in the configuration that is included in the live iso.
In comparison - KaOS distribution is free of kf5 and for example in KDE Neon, you can uninstall all kf5 packages without loosing fully functional KDE desktop.
Trying this in tumbleweed results removing whole KDE desktop…
Are there any plans to get the tumbleweed KDE Plasma Live iso (and resulting minimal install) free of kf5?
(The same could be also said in a large extent about qt5 packages).
KDE Frameworks 5.x packages will drop off, as the consumers of them do. There’s obviously something being installed that still requires kf5/qt5
Then an attempt to remove a kf5 package would result removing also that “something” but currently that “something” is a full KDE Plasma 6.5.2 desktop environment…
For example:
:~>sudo zypper remove libKF5WidgetsAddons5
Reading installed packages...
Resolving package dependencies...
The following 38 packages are going to be REMOVED:
breeze6 breeze6-style breeze6-style-lang kdeplasma6-addons kdeplasma6-addons-lang kf6-frameworkintegration-plugin kio
kio-core kio-lang libKF5Bookmarks5 libKF5Bookmarks5-lang libKF5Completion5 libKF5Completion5-lang libKF5ConfigWidgets5
libKF5ConfigWidgets5-lang libKF5IconThemes5 libKF5IconThemes5-lang libKF5JobWidgets5 libKF5JobWidgets5-lang
libKF5Style5 libKF5TextWidgets5 libKF5TextWidgets5-lang libKF5WidgetsAddons5 libKF5WidgetsAddons5-lang libKF5XmlGui5
libKF5XmlGui5-lang plasma6-branding-openSUSE plasma6-desktop plasma6-desktop-emojier plasma6-desktop-lang
plasma6-integration-plugin plasma6-integration-plugin-lang plasma6-session plasma6-theme-openSUSE plasma6-workspace
plasma6-workspace-lang xdg-desktop-portal-kde6 xdg-desktop-portal-kde6-lang
38 packages to remove.
Package install size change:
| 0 B required by packages that will be installed
-139,8 MiB | - 139,8 MiB released by packages that will be removed
Backend: classic_rpmtrans
Kas jätkata? [y/n/v/...? shows all options] (y):
Forgot to mention, that corresponding KF6 packages kf6-kwidgetsaddons and libKF6WidgetsAddons6 are installed anyway, so what’s the point of including ```
libKF5WidgetsAddons5? etc etc… Less packages, smaller iso image, less network traffic, less used electric energy, greener planet… 
No, it is not. “Something” is probably required by some components of the KDE Plasma 6.5.2 desktop environment, maybe indirectly. You need to identify this “something” which may allow removal of the stale dependencies and avoid the problem you are seeing.
Not in “KDE Plasma 6.5.2 desktop environment” but in openSUSE Tumbleweed packaged KDE Plasma 6.5.2 desktop environment. Several distributions are kf5-free for about a year and half. What I asked is the possibility to install clean and minimal Plasma DE and if somebody needs older software, then it just pulls in all the needed requirements…