To my mild dismay, it's not part of the base system in FreeBSD anymore[1]. It is easily installed, of course, but that means #!/usr/bin/perl does not work without manually creating a link.
[1] I think it used to be part of the base system, at least.
And this was the right move. It meant that the version of Perl was decoupled from FreeBSD releases, allowed you to choose which version to install, and allowed you to install multiple versions if needed.
[1] I think it used to be part of the base system, at least.