@VocalFan
I understand you are wanting to migrate a Trusted Launch VM from one region to another using Resource Mover. As the error notes, this is not supported currently with Resource Mover.
You will need to create a backup of the original VM then deploy that backup in the new region. You can use Azure Compute Gallery or Azure Backup for this task.
Hope this helps! Let me know if you have any more questions or need further assistance.
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