Wondering what are the cli options for managing a dedicated mainframe only VMAX3 All Flash outside of Mainframe Enablers on Z/OS ?

Does the onboard hypervisor which runs unisphere have some sort of symcli too? Can this be enabled after delivery ,  or is it something for factrory configuration only ?  Appreciate that we wouldn't wish to rely on this exclusively for mgmt purposes, but historically we've managed storage on our past VMAX VMAX40K via FBA symcli as we had a mixed , hybrid array of CKD and FBA.

Our Mainframe VMAX3 has a FC module connected to our SAN, how to we go about creating FC gatekeepers when all the disk capacity on the array is given over to CKD pool, can we create FBA GKs to manage via symapi on open systems ?

Our tech refresh > VMAX3 all flash took place when  CKD and FBA could not coexist on same All Flash  array , hence we have two new VMAX3 Allflash, but with a need to manage both from FBA hosts running a CLI (not via mainframe).

Is this  possible ?

Thanks

JC