I am so interested that I am in the process of getting knot-resolver-6.0.8 run on FreeBSD 😉

There are still quite serious hurdles related to the "manager" part that's new in 6.x and written mostly in python.

On our public [chat] there was Aisha attacking a part of the hurdles (focusing on openbsd but the issues would be mostly the same), but it doesn't look like the work's been made public (so far), I'm afraid.

[chat]: https://gitter.im/CZ-NIC/knot-resolver
(or you could use any matrix client)