The following article describes how setup and export to your MQ broker.
Configuration
This integration can be configured on the Export Configs tab on each Service Provider in the LoRaWAN Portal.
For MQTT export these fields can be configured:
If Topic or ClientId is not entered, they will be set to the value as shown above, and the {xxx} will be replaced by the actual value for that sensor.
This can then be selected on the sensor:
Content
See Export Format - Sensor Data