it might be possible that you are not able to see /content/websitename/datastore in aem author view as jcr:primaryType is not of cq:Page.
if you have to publish all the datastore node inside /content/websitename you can publish the websitename folder and if only specific as per some filter criteria you can use replication tree if that fits for your requirement.
otherwise you can try with workflow package and select individual nodes there.
Hope that helps