@Toh Thanks for posting in our Q&A.
For this requirement, based on my test, we can run the following command to add local admin right to the AzureAD user.
net localgroup administrators /add "AzureAD\UserUpn"
If we want to turn off "Local admin Right", we can run the following command to delete.
net localgroup administrators /delete "AzureAD\UserUpn"
However, there is no such settings in intune, if you are interested in this, we can feedback in intune uservoice in the following link. This is a place to collect customers' requirements and problems.
https://microsoftintune.uservoice.com/forums/291681-ideas
Thanks for understanding.
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