Google Drive permissions is different from OneDrive/SharePoint permissions, so it's possible that the way Google handles shared files doesn’t directly translate into how OneDrive or SharePoint handles them.
When migrating Google shared drive permissions, recreate a Microsoft 365 group with the same memberships as the Google Drive group. Map the original Google Drive group to the Microsoft 365 group in the "Map identities" setting.
Reference:
https://learn.microsoft.com/en-us/sharepointmigration/mm-google-overview
If the answer is helpful, 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.