ππhere is how to find your CPU and GPU fan speed on Linux https://www.cyberciti.biz/faq/how-to-find-fan-speed-in-linux-for-cpu-and-gpu/. Also, you can read CPU temperature sensor chip data, including Voltage and Fan Speed https://www.cyberciti.biz/faq/howto-linux-get-sensors-information/. Give it a try.
