@Ashish Kumar Arya , After doing a lot of research, I only find a link describe changing Intune device Primary user to last logged on user.
https://svdbusse.github.io/SemiAnnualChat/2020/03/21/Changing-Intune-Primary-User-To-Last-Logged-On-User.html
Note: non-Microsoft link, just for the reference.
I didn't find any link mentioned the method to changing the EnrolledBy. Maybe you can consider to contacting our Premier support to see if we can get more help:
https://www.microsoft.com/en-us/msservices/premier-support
Thanks for the understanding and have a nice day!
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