Hi IBN
Thanks for reaching out to Microsoft Q&A forum support and apologize for the inconvenience
According to this Microsoft’s official article, each Microsoft 365 tenant is allowed to change its SharePoint domain name only once. This is a strict limitation currently enforced by Microsoft. If you have already performed a domain rename in the past, any further attempts will not be allowed.
This limitation is in place regardless of how much time has passed since the previous rename. At this time, Microsoft does not provide a built-in method to reset or extend this limit through PowerShell or the Microsoft 365 Admin Center.
If your business operations are being significantly impacted by the current domain, the recommended next step is to open a support request with Microsoft in this link:
Link request: Advanced Tenant Rename
Hope you will solve your problem soon
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