All services in Azure have their own Disaster Recovery mechanism. The most famous one is Azure Site Recovery for Virtual Machines in Azure. If you want to replicate Virtual Machines to another Azure region, that would be the way to go.
Azure SQL Databases, the paas service, that doesn't require you to manage the SQL Server, has its' own mechanism to cope with regional outages.
So the answer to your question requires a little more context to answer it completely.