A global marketing team has created an email using Content Builder Approvals and shared itwith...

To make edits to an email that has already been approved and shared with multiple business units, the first step is to unshare the email. This action allows the original team to make the necessary changes without affecting the shared content in other business units. Once the edits are made, the email can be re-approved and shared again.

References:Salesforce Marketing Cloud Documentation on Content Builder Approvals