The required feature described as a wish
Currently, the option to dedicate a zone, pod, cluster, or host is available only during creation from the UI.
There is no option to dedicate an existing zone, pd, cluster, host to an account.
The action is only available from the API
https://cloudstack.apache.org/api/apidocs-4.20/apis/dedicateZone.html
https://cloudstack.apache.org/api/apidocs-4.20/apis/dedicatePod.html
https://cloudstack.apache.org/api/apidocs-4.20/apis/dedicateCluster.html
https://cloudstack.apache.org/api/apidocs-4.20/apis/dedicateHost.html
It would be beneficial for admin user to perform this activity from the UI
Images
Zone

Pod

Cluster

Host
