Fusion; HCM Person Record to FFS mapping

Summary:

We have a very large organization that is deploying Fusion HCM, Service and Field Service. Trying to understand the relationship of the person record details and the direct mapping to the Fusion Service bucket structure / hierarchy. Based on the current documentation is looks like there is only a mapping to the Organization Unit, not to the lower level buckets.

https://docs.oracle.com/en/cloud/saas/field-service/fagsf/t-manage-internal-resource-orgs.html
https://docs.oracle.com/en/cloud/saas/field-service/fagsf/c-what-happens-after-you-create-user.html

Is there a future plan to align the Internal Resource Organizations in Fusion with the bucket structure / relationship in FFS?