@jkl81 Thanks for posting in our Q&A.
Based on my research, I find a link describe the methods of gathering local admin information via Powershell as a reference:
https://flow.microsoft.com/tr-tr/blog/advanced-flow-of-the-week-gathering-local-admin-satus-from-microsoft-intune/
Note: Non-Microsoft link, just for the reference.
Honestly, graph is in the develop scope. It is not sure if there is any method can make it via graph. So, it is suggested to create a premier support ticket to get more accurate help. Here is the support link:
https://learn.microsoft.com/en-us/mem/get-support#premier-and-unified-support-customers
Thanks for understanding and hope everything goes well with you.
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