What is the version of SharePoint?
For SharePoint Server, refer to this article: https://www.sharepointdiary.com/2016/02/sharepoint-site-collection-permission-report-powershell-script.html
For SharePoint Online, refer to this article: https://www.sharepointdiary.com/2019/09/sharepoint-online-user-permissions-audit-report-using-pnp-powershell.html
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