@James Chan_110,Thanks for posting in Q&A.
From your description, I know you cannot enroll device to Intune.
Honestly, I haven't met this issue before. Let's do some check.
1.Please check Intune enrollment requirements follow the link below.
https://learn.microsoft.com/en-us/windows/client-management/mdm-diagnose-enrollment
2.Check if there exist related errors in the Event Viewer logs. Location: Event Viewer > Applications and Services logs > Microsoft > Windows > DeviceManagement-Enterprise-Diagnostic-Provider > Admin.
If there is anything update, feel free to let us know.
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