The binding will report them, and they will be available in the UI.
This is in the documetantion.
The UI will show you - as you have underlined in red :). Alternatively, the documentation lists the channel types - this is just added to the end of the UID in the standard ESH way.
I swear to god that I copied the CUID from the paper UI. Additionally, nothing is said about that channel number (that 8). you can check the channel tables for Zigbee binding here.
As I said earlier - the UI will show you the channels that the binding makes available. If the UI doesn’t show a channel, then the binding doesn’t provide support for that channel.