@Bhujbal, Shreyas Thanks for posting in our Q&A.
Honestly, I didn't find there is the shut down button in intune portal, so I'm not sure if this action is possible with graph api. Please note that graph api issue is more related to develop scope. With Q&A limitation resources, it is suggested to create an online support ticket to get more accurate help. Here is the support link:
Thanks for your understanding.
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