@Bob Han、Thanks for posting in our Q&A.
Honestly, I didn't find that we can make it via intune. What intune can do is based on what windows CSP provided. Currently, there is no such CSP.
I have searched a lot, if you are willing, you may create MKlink to sync any directory to your OneDrive. Here is the link:
Note: Non-Microsoft link, just for the reference.
Hope it is what you want.
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