As far as I can see it (I needed to ddg it, to know what is is; never heard of it, neither have a use for it), it's a Linux tool for getting information on block devices.
FreeBSD comes - by default - with several tools like gpart, df, du, diskinfo, camcontrol, nvmecontrol, smartctl,...and with zfs you also better deal with all the zfs commands/tools anyway - fully capable to deal with all drive issues, at least with FreeBSD's default filesystems UFS and ZFS on FreeBSD's default partition schemes MBR and GPT.
If all that suits someone's needs would come by default that would result in a completely bloated default system, with >>95% of things installed, most people neither need nor want.
The idea of FreeBSD is to give a very basic, but a complete and fully functional base system - all you want/need extra, you add extra yourself.
Example: Many "jack-of-all-trades" systems or desktop environments come by default with several texteditors: vi, vim, nvim, emacs, geany,... What for? Not that those are bad, but most users need
one. So install the one you need, instead to install twenty you don't need by default, wasting storage space, wasting bandwidth, wasting time just for saving the user the "unreasonable effort" of typing
pkg install myeditor?
Think that through to all other tools/progams there are somebody has a use for! Fourty window managers and desktop environments all completely installed be default? You use one. And headless servers need none at all. So you would need what 2TB and three days of install time, just to get everything by default, and then throw everything you don't need from your drive again, which afterwards results in a 6...8GB system?

Better kind of an empty box and add only what you need - at least I think that's smarter.
And FreeBSD's default "vanilla" installation is by far not an empty box, even if it may look like, just because it does not come with a GUI by default. Knowing all the tools a default FreeBSD have on board you don't need no other live-system for rescue issues; all you need is there. Just explore.
Do not all things that have a FreeBSD man page are included in the default install of FreeBSD?
All things on any unix[like] system shall have a man page. Man pages are the core and main documentation on Unix.
But it's not to FreeBSD to provide man pages apart from FreeBSD's man pages, but from those who wrote a program. (FreeBSD vs third party software)
Alas especially in Linux universe there are many who think man pages are not needed, or even no documentation at all.
IMO anything that does not come with a man page should not be allowed to the system.