With the release of the vmlinuz-4.18.0-240.x and vmlinuz- 4.18.0.193.19.x kernels, ZoL cannot connect with a ZFS pool. I'm not 100% sure, but I believe the last CentOS 8 kernel to work with ZFS 0.8.5 was 4.18.0.6.x.
Obviously CentOS does not support ZFS, so this means the ZoL folks must find and fix the problem. Otherwise, I think Fedora 33 is the only choice we have for hosting ZFS.
--Doc Savage Fairview Heights, IL