zfs-upgrade(8) on FreeBSD
The text 645d0d16ed3b, as FreeBSD 14.5-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE shipped it.
manage on-disk version of ZFS filesystems
Flags it lists
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-V -
-a -
-r