The flatpak is integrated with Kontact for some reason. Distro packages depend on your distro, which you didnt name and it will for sure be on KDE Neon too
Ah, within the container ... Some research required!
That said, I thought I was just missing something obvious, but since there has been no forthcoming answers, I assume it is not quite ready for people who are not willing to compile from scratch
I think I am just going to have to wait. I am hanging out for a good replacement for the office suite. I am currently using better bird which is good, but there are a few things that get to me, one being that I am in an unreliable internet country and the offline support has issues