Hi, I'm happy that more and more distros are looking into packaging an experimental KF6/Plasma 6 session. Since there are some non-obvious things to keep in mind while doing that I started collecting some packaging notes/information in https://community.kde.org/Plasma/Plasma_6#Packaging_notes.
If there is anything unclear or you have ore useful information to add feel free to ask here or edit the wiki directly. Cheers Nico