Currently it is not possible to share content with a group to which I do not belong.
But these use case is important when using enterprise groups.
As a GIS Administrator or Creator I want to be able to share my content to different organziational groups without being a member of each group.
Sample:
I'm member of the GIS Department and need to create an app for Department A (to which I do not belong).
My IT does not want to create individual enterprise groups each time when the GIS Department creates an app.
Therefore I need to be able to share my content to the Enterprise Group "Department A"