Hi Radu,
AFAIK, this is a fully managed health data platform, so Microsoft manages all the updates and maintenance. This page provides all the details of the release and updates to the env - https://learn.microsoft.com/en-GB/azure/healthcare-apis/release-notes
To see what will be releasing to the managed service, you can review the releases page of the open-source FHIR Server.
FAQ over here - https://learn.microsoft.com/en-GB/azure/healthcare-apis/fhir/fhir-faq
Hope this helps.
JS
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