Create shared folder as active directory would in powershell

With Active Directory I can manually create new users. Every time I do that, I use right click -> Copy on that user, then I modify some things like Name, Surname and SamAccountName. This process creates a new user with common properties with the copied user and also a home folder in our NAS (with path $NAS_path). I created a script to automate that and it works. The fundamental part of it is

$templateUser = Get-ADUser -Identity $usertocopy -Properties ObjectCategory, ObjectClass, PrincipalsAllowedToDelegateToAccount
New-ADUser -Name "$($user_name) $($user_surname)" -GivenName $user_name -Surname $user_surename -Description "employee" -SamAccountName $user_domain_name -UserPrincipalName "$($user_domain_name)@myorg" -HomeDirectory "$($NAS_path)\$($user_domain_name)" -HomeDrive "W:" -Accountpassword $password -ChangePasswordAtLogon $true -Instance $templateUser

For the most part I'm ok with the result. But it just creates a new user, how can I create a folder in the NAS with "similar" permissions for the new user? By "similar" I mean that the new user can do the same things with their new folder that the old user can do with their folder. Those are the permissions of the folder \\NASPATH\test.test of the user with SamAccountName test.test:

Get-Acl \\NASPATH\test.test | Format-List

Path   : Microsoft.PowerShell.Core\FileSystem::\\NASPATH\test.test
Owner  : BUILTIN\Administrators
Group  : MYORG\Domain Users
Access : BUILTIN\Administrators Allow  268435456
         BUILTIN\Administrators Allow  FullControl
         MYORG\test.test Allow  268435456
         MYORG\test.test Allow  FullControl
         BUILTIN\Administrators Allow  FullControl
         NT AUTHORITY\SYSTEM Allow  FullControl
         CREATOR OWNER Allow  FullControl
         MYORG\ouradmin Allow  FullControl
Audit  : 
Sddl   : O:BAG:DUD:AI(A;OICIIO;GA;;;BA)(A;;FA;;;BA)(A;OICIIO;GA;;;S-1-5-21-2801405462-3170940757-3729986713-3219)(A;;FA
         ;;;S-1-5-21-2801405462-3170940757-3729986713-3219)(A;OICIID;FA;;;BA)(A;OICIID;FA;;;SY)(A;OICIIOID;FA;;;CO)(A;O
         ICIID;FA;;;S-1-5-21-2801405462-3170940757-3729986713-1530)

If you create the user with -HomeDirectory "\\Server\Share\%username%" the folder will be created on logon with the user as owner.

The user needs to be able to create folders on \\Server\Share\. You could give this permission to a group like "all_users" which every user will be put into when creating. Give Create files / write data and Create folders / append data permissions.

As far as I'm aware, most sysadmins keep it that way.