Should smoke/heat detector device temperature be a sensor or diagnostic ?

[GH2user]

I have a few Frient smoke sensors (Develco 120) and a heat sensor, all used in HomeAssistant. These sensors report the temperature as a Sensor value. A similar door/window sensor reports it as a Diagnostic value. A Temp/Hum sensor reports it as a sensor value as is to be expected.
The accuracy of the sensor and measuring the device temperature make me wonder if these sensors should also report as Diagnostic. Especially now that in HomeAsisstant all these sensors are treated as Temperature when using the new 'purpose specific triggers' like temperature in an area or floor has crossed the threshold which automagically scans all temperature sensors in the area/floor. This would only allow proper temp/hum sensors to be scanned by HomeAssistant.
What do you think?

[andrei-lazarov]

I think it should be sensor if it measures the room temperature? and diagnostic if it measures the device temperature (showing how it warms up, or showing a device fault)

You can check this file if they don't show up correctly in HA
https://github.com/Koenkk/zigbee2mqtt/blob/master/lib/extension/homeassistant.ts