We cannot install wxPython4 on Debian. One message stated that wx is not supported on this platform, yet https://packages.debian.org/hu/sid/arm64/python-wxgtkxx exists for this purpose.
Also tried on Ubuntu18.04 and have not yet succeeded with installing the package.
We have all the usual dependencies: numpy, six, willow, gtk3.0+.
Has anyone had success with installing the package?