Versions 3.21.6 and 3.18.16 of pulpcore have been released. The packages are available immediately on PyPi [1].
See the changelogs[2][3] for details.
[1] pulpcore · PyPI
[2] Changelog — Pulpcore 3.21.6 documentation
[3] Changelog — Pulpcore 3.18.16 documentation