I've been thinking of #RACI as the framework for being clear about who's a reviewer vs who's an approver ... but actually the "A" is "Accountable", not "approver".

https://en.wikipedia.org/wiki/Responsibility_assignment_matrix does list "approver" as another possible expansion, but I think the "PACSI" acronym fits better. The Accountable person is often a common management root, and for web platform changes they've delegated Control to people like the #BlinkApiOwners, a security review team, etc.