Well, I would split the activities of an API Team into two kinds of activities: regalian activities and extended activities. Indeed, the governance of an API management team should set a framework in which all the actors involved in APIs should be part of, in order to fully express themselves and facilitate the integration of systems between them via API.
The Regalian Activities
I would call regalian activities those activities for which the API Management team has full authority and cannot be overridden. In these activities I put: