Migrating from OMV and permissions issues

I’m migrating from the latest OMV using ZFS and I seem to be having permissions issues, specifically with docker based “Apps” permissions on directories. Is there a simple way to reset permissions. I also noticed that where OMV worked fine with folders and permissions, TrueNAS prefers creation of unique datasets. I get it and am looking for a simple way to migrate. If anyone has been through this before and has plotted a course that I can’t seem to find in the forums, some pointers would be useful. Thanks!