Following the instructions here: https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_11_Bullseye
After rebooting, /usr/sbin is in the search path and therefore zpool is not either and I get this:
bash: zpool: command not found
After rebooting, /usr/sbin is in the search path and therefore zpool is not either and I get this:
bash: zpool: command not found