Storage with vsphere

I’m looking for advice on how to deploy a charm with added storage as described here:

juju deploy cs:~erik-lonroth/nextcloud --storage data=120G --constraints="mem=8G"
juju deploy postgresql --to 0
juju relate postgresql:db nextcloud:postgres
juju expose nextcloud

But vshpere doesn’t create the disk and juju just sits there waiting for the storage.

I’ve tried to find some documentation on if and how I would use storage with vsphere to no avail.

Any advice on how to do this?

Nothing is written about vsphere cloud and storage here: https://juju.is/docs/storage

Looking for any input here.