Feature request: pid_calibrate for Temperature_fan PID value

I’m currently working on addinga peltier cooler to my part cooling air path ,would like to control the peltier cooler with the temperature_fan function, but found that the pid_calibrate command can not be used with temperature fan. you guys make the pid_calibrate command available to use with temperature_fan function please?

I am also interested in having PID calibration for temperature fans.