Today I updated my system to 12.2-RELEASE from 12.1-RELEASE-p8. It was running the latest version of openzfs and openzfs-kmod from the pkg repo (as of 5:30PM Pacific Oct 27th 2020)which was 2020101600. During boot I was met with "openzfs.ko could not finalize loading". To rectify the situation, I simply built the port (2020102700) myself and had no more issues.
This is a symptom of a general package infrastructure issue. See the related PR. *** This bug has been marked as a duplicate of bug 250700 ***