It doesn't quite work like that. BCJ is much more than a simple xcopy of the source backup files to a secondary destination. Rather, it creates new backup files in the target by reading from the source. This is why you have settings to specify VMs, number of restore points, etc. The best way to schedule BCJ is for the interval to start shortly after your backup job. That way as soon as restore points are created by the backup job, BCJ will immediately begin processing them.
If you haven't yet read the docs, I encourage you to read through the BCJ section of the VBR User Guide as it gives a much more detailed explanation on how this works.https://helpcenter.veeam.com/docs/backup/vsphere/backup_copy.html?ver=95