Subscribing to a sensor's Exposes

I have Zigbee2mqtt setup using docker compose on a raspberrypi 3B.
The adapter is the new SONOFF USB3.0 one. And I have a sonoff temperature and humidity sensor.
I am struggling to get mosquitto to subscribe to the temperature exposes, or any for that matter.
I tried:

mosquitto_sub -t 'zigbee2mqtt/tempsensor/temperature.

But this does nothing.
When I only subscribe to ‘zigbee2mqtt/tempsensor’ it sends and receives pings but no data

The sensor does work as I can see the temps changing in the frontend