Confused with RAID storage usage

I have 5 4TB drives in a RAIDZ2 setup. On there I have a single pool, which contains a single 8TB virtual hard drive that goes to vmid 100.

However, since creation Proxmox is saying that the storage is full

Usage 99.07% (11.59 TB of 11.70 TB)

lsblk inside the VM:

sdb 8:16 0 7.8T 0 disk
└─vg_hdd-lv_hdd 252:1 0 7.8T 0 lvm /mnt/hdd


if I dive into the ZFS infos I get

root@pve:~# zpool list
NAME SIZE ALLOC FREE...

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