Jim-2159 I have answered your query here - https://learn.microsoft.com/en-us/answers/questions/75965/how-to-move-my-vms-from-an-existing-rsvault-to-a-n.html?childToView=77509#answer-77509
I don't think you can save restore points in some other RG. I would suggest you try restore disk option which lets you store your data in a disk and then create a VM using that disk.
Reference link - https://learn.microsoft.com/en-us/azure/backup/backup-azure-arm-restore-vms#restore-options
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