@Ritesh Sharma Thanks for posting in our Q&A.
For bulk enrollment, it needs network in the process. It is suggested to try to configure the Wi-Fi network devices connect to when they first start and then check if the device can enroll to intune successfully.
https://learn.microsoft.com/en-us/mem/intune/enrollment/windows-bulk-enroll
If there is anything update, feel free to let us know.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.