KDE online accounts missing in Debian 12 derivatives.

I use a hosted NextCloud instance, and am therefore interested in basic KDE integration with contacts and calendars. As I am interested in migrating back to a Debian based distro from Fedora, I have tried a couple of options so far - Spiral Linux and SolydXK. Neither of which seems to have KDE online accounts setup properly. If I have to, I can of course try installing vanilla Debian Bookworm with KDE as well, to test if it is the source of the problem. However, it would be of course simpler, if I just could make sure that the necessary packages are installed, so that the options show up and function in the KDE system preferences.

Any ideas how to solve this?