It's too complicated and confusing for an edge case use that will not be an issue with 6.12 because your ZFS Pools will be moved to Unraid Pools.
You should assign alias disk names to organize the disks. As I suggested, name them "Zpool1", "Zpool2", etc and they will show at the bottom of the list because UD sorts the disks based on the device (alias) name. Actual UD disks will be at the top. A reboot will not change the alias disk names and disks will not show a different order.