The documentation has some confusing statement which shall be corrected as per issue : https://github.com/openshift/installer/issues/7003 and the fix to it as https://github.com/openshift/openshift-docs/pull/66190  Not sure how it's inherited to our docs to adding it as direct issue here.

Doc: https://docs.openshift.com/container-platform/4.12/installing/installing_with_agent_based_installer/installing-with-agent-based-installer.html see 

Version-Release number of selected component (if applicable): 4.12 and above

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