@Flavia, Thanks for posting in Q&A.
I have done some research about this issue my, currently there is no such feature in Intune, nor is there a related script that could be the implementation of sending or requesting an administrator's authorization before completing the registration or compatibility process, and that the process of registering to Intune is done automatically.
If you want to implement a restriction that certain devices cannot be registered to Intune, you can try the device platform restriction setting.
https://learn.microsoft.com/en-us/mem/intune/enrollment/create-device-platform-restrictions
Hope this can be helpful.
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