Plasma Mobile (official site) is a port of Plasma to touch driven devices. There has been some progress and even a ArchLinux Repo () but this seems to have faded. Nevertheless, PKGBUILDs are still available there and most of them build without much efford being put into it.
Install plasma-mobile-git in addition to a full plasma installation.
As there is currently no session file, you need a special display manager, use simplelogin-git for this.
Starting a Session
Enable simplelogin via systemd and restart your device.