There's a merged pull request on the void-packages repository

mkinitcpio: update to 30, add mkinitcpio-zfs subpackage
https://github.com/void-linux/void-packages/pull/30930

Description:
ZFS hooks taken from [1] and modified to include /etc/hostid.

The version bump should be straightforward, but my ZFS-enabled image failed to boot. This needs more testing to make sure we can create usable initramfs images.

[1] https://github.com/archzfs/archzfs/tree/master/src/zfs-utils