I think you are asking if a single iSCSI target can be connected-to from
multiple iSCSI initiators simultaneously.
The answer to that question is ‘yes’, and like most yes/no answers it
should probably e followed with a few caveats: if both initiators mount
the filesystem for writing (r/w) and if the filesystem is not made for
concurrent writers and if both systems write to the filesystem, you could
corrupt your data in a terrible way. Basically, don’t do this.
If you want to see the same data on multiple boxes then mount it on them
read-only, or mount on one and then share (using something like NFS or
another network-based file sharing protocol) with all other clients.
Doing so gives one system control of the filesystem and all others access
through that one system.