@Shah, Gaurang Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Presently databox heavy isn't available in Canada Central region for now.
Service availability - For this release, Data Box Heavy is available in the following regions:
All public cloud regions in the United States - West Central US, West US2, West US, South Central US, Central US, North Central US, East US, and East US2.
European Union - West Europe and North Europe.
UK - UK South and UK West.
France - France Central and France South.
Destination Storage accounts - The storage accounts that store the data are available in all Azure regions where the service is available.
For the most up-to-date information on region availability for Data Box Heavy, go to Azure products by region.
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Hope this helps!
Kindly let us know if the above helps or you need further assistance on this issue.
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