Thank you for posting in Microsoft Q&A forum.
1,Based on my understanding, the issue now is that auto computer name change is not working for the OS older than Windows 10 version 2004, for example version 1909. If I have misunderstood anything, please feel free to let me know. If possible, please share the screenshot to clarify the issue.
2,Windows autopilot can use name template to assign computer name.
You can also try to use PowerShell to rename computer in Intune. Refer to:
How to rename Windows 10 devices in Intune using PowerShell
Note: The non-Microsoft link is just for your reference.
Thanks for your time. Have a nice day!
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.