I can't see a specific operation to synchronize packages there (7.6 swagger docs) in either the vRO Client API or the ControlCenter API.
However, you should be able to mimic the operation if you just export the package from the source server and then import the result on the other? The REST API has operations for export and import package
The Export operation states the following
The Import like so
Note that you would doing a single direction sync here (FROM source TO target) which would mean that you'd have to consider which server should be the source. If you wanted to Two-way syncing then it looks like you'd just need to do this
1. Export from Server1 --> server1.package
2. Export from Server2 --> server2.package
3. Import server1.package on Server2
4. Import server2.package on Server1
A bit of messing about but it looks workable?
Package synchronization command is not directly exposed in vRO REST API.
It certainly does look workable! Thanks so much for this.