At the moment Linux aarch64 wheels are being made in a TravisCI job. I've been experimenting recently about making scipy wheels for that target on Github Actions. cibuildwheel + github actions does quite well for that purpose. It takes around 2 hours for scipy wheels to be created (but not tested). I would expect numpy wheels to take less time to build.

I think it would be a relatively minor modification of the .github/workflows/wheels script.

Dr. Andrew Nelson