root disk

We have three drives in our PVE 6.4-13 server. Two mirrored 3TB drives and a solo SSD When I go to Datacenter | pve | Disks | ZFS, both sets of disks appear: When adding a container, I don't see the 3TB pool - where have I gone wrong, what's best way to make this space available for containers?

In a container summary view, the Proxmox GUI displays a lot of useful resource reporting, like CPU, RAM, and Swap consumption. It also shows the allocated total space for the root disk of the container, but I don't see a data point for the amount of root disk that is consumed/used. Why is that...