Nope not as I understand it.No luck involved. Another Freebsd committer reached out to Donenfeld (lead author of Wireguard) with concerns about the implementation.
The two of them plus an Openbsd developer that worked on the Openbsd WG implementation then worked together to come up with an alternate implementation.
See Kyle Evans post: https://docs.freebsd.org/cgi/getmsg.cgi?fetch=0+0+archive/2021/freebsd-arch/20210321.freebsd-arch
To quote Donenfield to Kyle Evans after he pulled the entire code out of the tree: "I think what you describe is a great plan. I think everybody realizes
at this point that the original code base from the original author never should have been merged."
So the process is flawed, it was lucky that Evans found these bugs. The fact Evans thinks now it is best outside the main, is evidence that this code should never have got to where it did, a release candidate. Quality control of security-scale software needs more than what FreeBSD just showed for Wireguard.