CentOS 6 support - which is used as the base image for manylinux2010 - has been EOL for more than a year.

We're seeing regular issues during image builds with yum accessing the vault repositories and this might become "unsustainable" (for manylinux maintainers and for packagers with a need to install system packages with yum).

There's now very little need for manylinux2010 compatible wheels where the "pip readiness" is less of an issue than with the drop of manylinux1: the highest percentage is for python 3.7 with around 7% of systems that are >= manylinux2010 and < manylinux2014, due to the pip version installed only.

This will happen this year, how soon will probably depend on build stability.
Images won't be removed from quay.io and will still be usable as-is.

discourse thread: https://discuss.python.org/t/dropping-manylinux2010-docker-images-support-in-2022/13540