How to add custom nRF device to zigbee2mqtt

Hello there! I've been developing a custom device with a nRF52840 dongle. For this I had to develop a custom cluster to properly support the type of data I wanted the device to output.

The device outputs 2 temperatures and a current. I've managed to properly set it up and I got it communicating between 2 nRF52840 dongles, but now I'm looking to use a zigbee2mqtt dongle based on Texas CC2531 as a coordinator to receive the data. This is where I'm finding difficulties, as no one in the Z2M community seems to be able to help me or point to an example. I can pair the device and even got it to be recognised as "supported" by z2m, but no data is being received, this probably has to do with the fact that I can't bind the custom cluster I've created for this device with z2m.

Does anyone have any experience with this particular case that can help me?

Thank you and best regards.