ZYXH 16 gang switch Group

[douglasfl]

Hello,
I have a device with 16 relays, it is recognized by zigbee2mqtt and I can control all the relays.

It was recently added (Koenkk/zigbee-herdsman-converters#6007).

However, I would like to create a group, so that I can control all the relays at once.

I have a group with other devices and even multiple devices and it works very well,
However, with this device, when you have to add the endpoid, it only adds endpoint 1 regardless of which information...

Would it be possible to create a group or create a converter that would have an entity to control all the relays at once?