Comment 16 for bug 1912188

The solution is to use ZFS 2.0.1 with Hirsute, however this is stuck in the -proposed pocket at the moment because of a build failure issue of a dependency on zsys. I suggest using the zfs that is in the following PPA:

sudo add-apt-repository ppa:colin-king/zfs-hirsute
sudo apt-get update
sudo apt-get install zfs-dkms

This is the same as the package that is stuck in -proposed, and should allow you to use ZFS on that kernel w/o issues. Please try this and let me know if this helps.