Please update the SharePoint status to "Production Verified", if request is perfect in production and is as desired per the request.
In case of any discrepancies existing, between UAT and PROD pages, needs to be highlighted and flagged off immediately, for rectification and closing this.
If the status in SharePoint is not changed from Cutover (requestor receiving the live url by mail) to Production Verified within 24hours, this surmounts to an understanding and we agree upon, that, all pages are functioning well in production and the request has been met correctly. On the same lines, we would change the status to "Closed after 1 day (no errors highlighted by requestor 1 day after cutover)" and close the request.
For Further amendments, a new request on SharePoint should be raised.