This is mostly a reminder for all to run pacman Qm
on a regular base on this rolling distribution.
Running that say, once a month, will show you which packages are no longer in the repository (it will also show self-build packages).
Especially at this stage of moving all away from Qt5/kf5, you will notice that quite regularly another kf5 package has been removed.
Example today, tellico, heaptrack, k3b & rkward moved to Qt6/kf6 builds. A few other kf5 based have been rebuild to remove kf5 packages that really don't work on Plasma 6 (kactivities 5 for example), so another batch of kf5 packages are no longer needed or in the repository.
Don't expect kf5 to be completely gone anytime soon, it will probably still be needed this whole year.