There is a request to document resolverStepActions, in this section: https://docs.openshift.com/pipelines/1.17/install_config/customizing-configurations-in-the-tektonconfig-cr.html#op-disabling-cluster-tasks-and-pipeline-templates_customizing-configurations-in-the-tektonconfig-cr

but possibly even in other places. See this PR comment.

This upstream page can serve as an example: https://github.com/tektoncd/operator/blob/4525300701d7e0b5c14928793e0ed699c128dfb6/docs/TektonAddon.md?plain=1#L9