Python 3.9.1 has been released this now supports Apple Silicon (M1 chip).

Installer news 3.9.1 is the first version of Python to support macOS 11 Big Sur. With Xcode 11 and later it is now possible to build “Universal 2” binaries which work on Apple Silicon. We are providing such an installer as the macos11.0 variant. This installer can be deployed back to older versions, tested down to OS X 10.9. As we are waiting for an updated version of pip, please consider the macos11.0 installer experimental. This work would not have been possible without the effort of Ronald Oussoren, Ned Deily, and Lawrence D’Anna from Apple. Thank you!

Also note macOS ARM builds on conda-forge, and clang compilers for conda-build 3 https://anaconda.org/conda-forge/clang_osx-arm64