Hi Matthew,
Unfortunately, this feature is not currently available. But it’s a great idea.
BTW, to bulk upload images, we have support for the WooCommerce default import and export feature.
Will you please add your feature request here: https://storepress.fider.io/
and ask others to upvote it.
Cheers!
API Access
Matthew Murchie
Does your plugin support access to adding the additional variations images via API?