I’ve recently patched almost all the tools, a part a wizard for Arc pads, which is missing because of some SWIG kicad internal issue.
not ATM
you need to install RF-tools with the old method… i.e. cloning the repo in the right plugins folder.
the right place in linux would be:
~/.local/share/kicad/8.0/scripting/plugins/RF-tools-KiCAD