The ability to create system notifications/PSAs in AEM Headless

Adobe proposed this solution: https://adobe-consulting-services.github.io/acs-aem-commons/features/system-notifications/index.html

Results research: I have researched and tried out the ACS Commons System Notifications in the past already. Those only work in the "old" AEM UI, not in the "new" CF Admin/Editor or Universal Editor. So any author directly going into those UIs would never see the notifications. And even authors accessing the old UI might be confused since it disappears on the new UIs. They might think only the old UI is affected by whatever the notification says.

1- it would stay up as long as we need it (if we posted a message about an outage or major incident, we'd want to disable it once the situation was resolved)
2- it would be an informative message related to an outage or major incident - example: We’re currently aware of an issue affecting all pre-owned inventory, including Certified Pre-Owned (CPO) pages, on oADD live sites where inventory is not rendering as expected. Our team is actively engaged with our development team to work towards a solution.

3- Permissions: Only admins can create (we need to centralize it and restrict it to one decision making group).

4-This PSA should NOT require developer involvement to create 

5- Ability to show it to only specific user groups. For example, we want to show a specific message to French content authors in Canada