Time Machine Backups - Mac Catalina

[anodos]

The problem is that TrueNAS GUI itself does it like that: everyone@:--------------:fd-----:allow if you select time machine ACL preset for TimeMachine dataset. Which gives chdir_current_service: vfs_ChDir(/mnt/mypool/TimeMachine/myuser) failed: Permission denied. error when adding disk to TM.
So what is the proper getfacl output for both, TimeMachine dataset and child, user datasets?

In U3 we're loosening up the default ACL for new SMB datasets to allow "modify" for builtin_users (inheriting) and traverse for everyone (non-inheriting), which should make it so that users can skip the set of adding group / user permissions after creating a dataset.