In SharePoint Online the Site Network Administrator (SNA) is responsible for SharePoint Online in their area. The Business Owner is accountable for it.
Site Network Administrator (SNA)
Site Network Administrators (SNA) are responsible for the structure, usage and permissions of their hubs and sites. They control their content and application creation, page layouts, navigation, libraries and folders. They can read, download, create and edit content and documentation. Site Network Administrators provide technical assistance.
The Business Owner is to help manage the University’s SharePoint Online. They oversee and are accountable for the content and use of SharePoint Online in their college, department or division.
Ideally this person is a senior administrator or Senior Management Team (SMT) member, but need not be a technical person, as they have no responsibilities within the system.
Their role is to ensure the business use of SharePoint Online in their unit is compliant, consistent, managed and supported, and to nominate a sufficiently skilled Site Network Administrator.