There is a new pull request by abenson against master on the void-packages repository

https://github.com/abenson/void-packages wxPy4.0.6
https://github.com/void-linux/void-packages/pull/14588

wxPython4: update to 4.0.6.
- Also fix an issue with permissions from source tarball that leads to a
  broken package. Reported upstream at
    https://github.com/wxWidgets/Phoenix/issues/1363

A patch file from https://github.com/void-linux/void-packages/pull/14588.patch is attached