Hello and welcome to the communities.
Did you add it as a virtual disk or a RDM?
Does the VM's properties reflect the disk being there?
Did you rescan the storage in Windows, after adding it?
vmroyale probably nailed this already but...
Did you install the Microsoft iSCSI connector and configure it properly in Windows?
not sure why it didnt work at first but blew it away and tried again and now its working. thanks for the help.