I've now created the ansible-community organization on @Codeberg to do exactly the same: https://codeberg.org/ansible-community
I'm not looking to justify my personal motives for this at this time but know that it is not meant to compete with https://github.com/ansible-community and does not intend to spur a migration from GitHub either.
It is meant to be a neutral, general purpose place to contribute on Ansible projects together outside of GitHub because the Ansible community exists outside of #GitHub.