dietpi-config only has CPU Governor "performance" and "powersave"

I also counter check my intel nuc & only “PERFORMANCE” AND “POWERSAVE” available in dietpi-config. provided commands also shown only these two options available.

root@DietPi:~# cat /sys/devices/system/cpu/cpufreq/policy1/scaling_available_governors
performance powersave
root@DietPi:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
performance powersave
root@DietPi:~#