That's incorrect. All 0.18.1 binaries provided by the FreeCAD project on Github are now based on Python 3. Only binaries/installers provided by third-party packagers may still be based on Python 2, such as the snap and flatpak packages.
The freecad-stable PPA for Ubuntu provides a dual Python2/3 metapackage; the Python version can easily be switched from a terminal using
Code: Select all
sudo update-alternatives --config freecad