Use existing Ceph RBD image in an instance

I am struggling getting an Ceph RBD used by an container instance. Plan was to mount the RBD to a specific folder.
The RBD is likely to be copied form another Ceph cluster or simply created like this: rbd create incus/container_zabbix_postgresql --object-size 16K --size 4G.

But adding the RBD to an instance files, as for incus it doesn’t exist. I tried with incus storage volume import but it errors out and complains about remote is not existing and by looking at the help output I am not sure if this is the way to go.

How to get those RBD images attached?