We do not have any immediate plans to build and maintain a podman runner, however, we do provide a framework that lets anyone in the community create a custom runner. There is no difference between an official runner and a community runner other than stewardship.
The starter project and framework for creating a customer runner:
The tooling to create a custom runner is new and has not been formally announced or documented yet, however, a few community members were able to use the starter project and research existing runners to figure it out.
Also happy to answer questions.