SharePoint admins and site admins have different levels of access and responsibilities.
SharePoint admins have access to the SharePoint admin center and can manage settings at the tenant level, such as creating and deleting site collections, managing sharing settings, and configuring policies. However, they do not automatically have access to all sites within the tenant.
Site collection admins have full control over specific site collections. They can manage permissions, site settings, and content within their assigned site collections.
If you need to limit a SharePoint admin's access to specific resources, you can manage their permissions at the site level by assigning them as site admins only for the sites they need to manage. This way, they won't have access to other sites within the tenant.
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.