Hi,
You forgot to tag me ;)
Yes, we've recently integrated with Oracle HCM Cloud.
Oracle HCM has really nice REST APIs for integration.
We wrote a custom ECMA 2.0 Connector that integrates with the Oracle HCM Cloud REST APIs. It works really well.
Unfortunately, I cannot share the code. However, Oracle has great documentation for the API, so you should be able to read that and create a Connector (it will require coding though):
https://docs.oracle.com/en/cloud/saas/human-resources/21a/farws/index.html
Another option is PowerShell if you are familiar with that, and do the REST Calls using PowerShell.
Br,
Leo