RPI CM3+ - ZFS boot possible?

Hi all,

can these modules boot from ZFS? I would probably be able to create a ZFS based setup
by installing the regular image, copying the entire root UFS to the swap area and booting
into that.

Memories ... that used to be how you created mirrored setups for commercial Unices
like e.g. Sinix/Pyramid. ;-)

From that temporary system running in the ~ 2 GB swap partition I could create a
ZFS installation in the remaining ~ 27 GB of the onboard MMC storage.

But what - if at all - do I need to change in the EFI partition to make the system boot
from ZFS?

Kind regards, TIA,
Patrick