Hi @Mohammed Siyam (DevOn) , you can manage Azure B2C resources and permissions by following the steps outlined in this document: https://learn.microsoft.com/en-us/azure/active-directory-b2c/tenant-management
Users need at least a contributor role on the Subscription to create a b2c tenant, so if you're the subscription owner you can make sure they don't have enough permissions. You can do this by following this document.
If you have any questions please let me know! If this answer helped you please mark it as "Verified" so other users may reference it.
Thank you,
James