The latest releases of KDE Software -- in particular KDE Plasma 5 Desktop -- are not yet available in FreeBSD ports. However, the unofficial ports tree, area51, does have ports for KDE Frameworks 5, KDE Plasma 5, and KDE Applications. There are also unofficial packages available (see the area51 documentation for details).
Area51 is unofficial, i tried to install but for some reason not working well. I was asking, if someone stricte from BSD project working for port KDE5. I thing if they cant do it, or support for Xorg is step by step dropping.