I no longer have this option in my Admin Center | Message Center... Not sure when it disappeared... My O365 Roles have not changed, and I can't find anything that suggests MS changed who can edit these.My O365 Roles are:
Power BI Service Administrator
Service Support Administrator
It's still available in my tenant, though I'm logged as a Global admin. Do other folks in your company see it? Might be something on the tenant level, or simply the role.