Quick post here, I had to recover from a flooded basement. Sorry for the day outage. I had to put my disc in another server and load FreeNAS, and import my ZFS volumes, recreate the iSCSI targets, and then I added them to my ESXi hosts, and rescanning the HBAs shows the disks…
but the datastores were not visible…
so I googled and found this VMware thread with some helpful commands to try. (I do kind of agree with the OP, that its annoying they removed the front end UI for import that could handle this)
esxcli storage vmfs snapshot list
esxcfg-volume -M UUID
Ehh it worked!
Hope this helps someone. If this doesn’t work you might have some other underling issue?