Hi @성지환 , welcome to Microsoft Q&A forum.
Yes you can use the oracle RAC through the CloudSimple Private Cloud environment that allows us to run VMware platform in Azure, so VMware environment runs natively on Azure bare metal infrastructure in Azure cloud locations.
Below is the Microsoft Doc link that describes the process to set it up:
Optimize your CloudSimple Private Cloud for installing Oracle RAC
Below is the link that talks about what is CloudSimple cloud and how it runs on Azure location:
What is Azure VMware Solution by CloudSimple
Please let us know if this helps.
----------
If answer helps, please mark it as 'Accept Answer'