When trying to create storage policy with deduplication & compression on vSAN ESA 8.0, an error will display "Datastore does not match current VM policy. Expected space efficiency of datastore does not match with disk groups space efficiency configuration"
VMware vSAN ESA 8.0
Deduplication is not available in the vSAN Express Storage Architecture 8.0 (ESA), only Compression.
Deduplication is planned to be available in a later release of ESA in the future.