Today manage user is just delegated by admin to setup user access to the universe. Manage user can just invite others to his/her universe, but the scope of the universe is configured by admin only.
Release : SAAS
Component : APM SAAS ENTERPRISE
It works as designed. We have an enhancement request in process in order to deliver this new feature. If you want to know the status of this request, please raise a ticket in https://support.broadcom.com/ and refer to this knowledge article.