As other's have mentioned, Apple don't allow MDM vendors to manage Airplane mode (for obvious reasons).
The ONLY way to achieve this is to put the devices into Kiosk Mode. You can do this in one of two ways
Basic Kiosk Mode
Autonomous Kiosk mode
The first can be used with *any* application, and locks the device into using only this application. There are a tonne of caveats and nuances, though, so I would suggest testing
Autonomous Mode is much more interesting: It allows you, when using applications that you have developed, to put the application into kiosk mode. BUT: It allows you to develop capability within the app to go into and out of kiosk mode WITHIN the application itself
Anyway, long story short: Kiosk mode is the only way to prevent users using control centre