The following command returns an object for the folder ACL
Get-Acl -Path $env:TEMP
The object type is System.Security.AccessControl.DirectorySecurity
MS Docs lists amongst other properties AccessRulesModified and AuditRulesModified. With Get-Members i find the methodes ModifyAccessRule and ModifyAuditRule, but not the mentioned properties:
As you can see from the documentation pages on those particular properties, these are not public properties, they are protected — this means that only the object itself or objects inheriting from this type can access these properties.