16 channel gateway in EU area

if I’m not mistaken, in EU are available 8 channel for LoRaWAN communications. So what can be the benefit in adopt a 16 channel gateway in this area? I realized the opportunity to use two directional antennas but with two omni I can’t understand how can be useful.

To make full-duplex communication.

This means that when the gateway is trasmetting a downlink message, it is still available to receive uplink from devices on others channels? In this case to be compliant with regulations, the duty cycle of the gateway is doubled due to the presence of two transceiver, or it is yet just one device and so still 1%?

Pls. refer to the chip specs. on which LoRa-gateway based. If You talking about SX1301, yes it has 2 trancievers.