Office Groups - Shared Calendar - Manage Categories

Users can Manage & create New Categories within their Personal Calendar. We recently started to deploy & use Office Groups and Teams. Each of these collaboration spaces comes with a 'Shared Calendar'. When accessing the Shared Calendar we can manage (CRUD) events/meetings etc and assign Categories to the events/meetings. We also want to change/rename the default Categories (PBGYOR) and add new categories, then start assigning them to the events/meetings. Unfortunately the options 'New Category' and 'Manage Categories' are grayed out, even for the Owners of the Office Group.

Do the options require a specific permission? If so how can we assign that permission?

Is there any PS script to enable the options?

If not, is there anything on the road map regards Categorizing within Office Group - Shared Calendar?