Hello @JT Mauro - Thank you for reaching out to us!
If I understand correctly, you want to change contact information for Azure billing account like it is mentioned in the doc - https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/change-azure-account-profile, If this is not what you are looking for, I would appreciate if you could share the screenshot of the UI.
FYI: Global Admin is the highest privilege assigned at Azure Active Directory level
Azure Owner/Contributor is a subscription level privilege given to the user.
Ref doc: https://learn.microsoft.com/en-us/azure/role-based-access-control/rbac-and-directory-admin-roles
I