Prometheus Missing Sensors

I only have 2 temperature sensors at the moment but only 1 of them is appearing in the export of data to Prometheus and I can’t figure out why.

I was expecting to see them both in homeassistant_sensor_temperature_celsius but only the Magic Cube one does.

Is it the missing device class or state class? If so, how do I add them? The device is an ESPHome entity.

It’s not actually missing, but it’s under a different group, homeassistant_sensor_unit_celsius, rather than homeassistant_sensor_temperature_celsius