Colour temperature not available to Homekit tuya bulbs

For some reason, when Home Assistant is exposing the Tuya lightbulbs I have configured through Tuya Cloud, Homekit does not see the ability to set a colour temperature.

With my Meross bulbs, when I ask Siri to set the colour to “warm white” it will use the colour temperature function and set it to some Kelvin value. With the Tuya bulbs, I just get colour name “white” in the wrong colour mode.

Anyone know how to fix this?