A cloud-based identity and access management service for securing user authentication and resource access
Adding SCIM provisioning functionality is a new provisioning request, not an update. Changing something about an existing provisioning integration (e.g.: adding a new attribute mapping, adding support for groups..) is considered an update. "Update requests will be processed on a case-by-case basis" means that there is no guarantee of an update request being processed in a certain time period after it is submitted. Requests for updates to existing provisioning integrations that are needed to avoid breaking changes or address security issues are examples of "cases" that would most likely be processed urgently.
Currently we are not accepting new requests for provisioning integrations. If you are the developer of an application and have customers that need to provision into your application via SCIM, they should use the custom non-gallery application, which includes a "generic" SCIM connector that is compatible with most SCIM servers.
To add the custom non-gallery app, from the Entra portal, click Enterprise Applications -> New Application -> Create your own application -> Select 'Integrate any other application you don't find in the gallery (non-gallery)' and click Create.