The Unified Intelligence Center Reporting interface was updated over three recent releases (11.5, 11.6 & 12). The second web interface into the system (System Administration - operation administration management provisioning) is currently still in the legacy interface. Are there plans to update this interface as well and if yes, when?
In last 1 year, I have seen that Cisco has updated Web Admin Interfaces for many products. Cisco might have this one in roadmap but I am not sure when. You can reach out to your Cisco SE or Account Manager to get the details.