Channel Distribution not seen in Airmatch when a particular folder where the controllers are added is chosen.
Usually the IAPs would show the channel distribution in Airmatch by default, but when you select the Airmatch for the particular folder where the controller and its APs are present you will not be able to see the channel distribution data
This is because if the controller is monitored by Template mode.
If the controller is in Template mode, the channel distribution in Airmatch wil not be seen.
Enable the Aruba GUI config at the Group-->Basic page where the controller is added.