Proper procedure for migrating servarr services from JABOD to zfs

Setting up my server as a newbie some years ago, I did not have the ability to purchase more then one 8TB hard drive. Outgrew that rather quick and now I have two additional 16TB drives, in a Just A Bunch Of Disk configuration, mounted to different /mnt mount points. I know this is not ideal, but lacking the ability to expand...