The 4.14 version is missing from the dropdown menu on the OpenShift Container Platform API documentation page, even though it's still a supported version.

https://docs.redhat.com/en/documentation/openshift_container_platform_api

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Should have 4.14 version page, otherwise it needs information why specific version is missing.    

The documentation seems to exist when manually changing the version and opening the detailed page. :

ex. API Overview 
https://docs.redhat.com/en/documentation/openshift_container_platform_api/4.14/html/api_overview/index

However some document is shown as page not found :

ex. Cluster APIs
https://docs.redhat.com/en/documentation/openshift_container_platform_api/4.14/html/cluster_apis/index