Currently when creating a new Group in the Contents Pane by selecting a couple of layers > right click > Group, the new group has to be clicked on to select it before F2 will activate a rename operation.
Although the new group is highlighted after Pro creates it, it is somehow not really selected.
As I am sure everybody renames "New Group Layer" to something else, the global wear & tear on mice must be awful for Mr Dangermond to carry on his shoulders, so I hope this is implemented quickly.