The man page for awk(1) says you can find the version with awk -V
Instead, it seems you find the version with awk --version and awk -V does not work.
I don't have gawk or any other awk installed from ports or packages, so I know this is a bug.
$ awk -V
awk: unknown option -V ignored
awk: no program given
$ awk --version
awk version 20121220 (FreeBSD)
$ uname -a
FreeBSD nyann.tanasinn.mochi 12.0-RELEASE-p10 FreeBSD 12.0-RELEASE-p10 GENERIC amd64
$ freebsd-version -kru
-version also works along with --version, by the way
I'm looking into this.
Will also work. Trying to evaluate the best approach and have pinged another developer that has worked with awk recently.