https://wiki.freebsd.org/Myths#FreeBSD_is_Just_macOS_Without...

https://developer.apple.com/library/archive/documentation/Da...

You have also had patches go from Apple straight into the FreeBSD tree with improvements they made on their side. So, yes, it certainly is not as easy a case as one would make for Sony’s forks, but the answer is certainly not a resounding “no”.