B660m pro as cannot set fan below 1800 rpm

I checked the pictures you atatched, but noticed, the CPU temperature is only 36 degrees.
As far as I now, nothing happens below 40 degrees.
You probably have a 4 Pin PWM fan, which is common for Intel
now I will bore you with some technical info
3 pins fans layout
Pin
1 = +12 volt variable
2 = - (ground)
3 = RPM sensor
The speed is regulatyed by changing the voltage on Pin1

4Pin fan
1 = +12Volt FIXED
2 = -
3 = RPM sensor
4= PWM
Here 12Volt is fixed, and the frequency on pin 4 sets the speed

In fact a 4 Pin fan is basically the same as a 3Pin, but inside the fan there is some electronics that interpretes the PWM sighnal and changes the voltage
Intel fans, do not have the best reputation, and some aftermarket manufacturers go way above the intel specifications, when it comes to the pressure they apply onto the CPU, and can cause a socket to bend.
The only brand that doesn't, that I know of, is Noctua, and the besty coolers are the topflow, where the fan is lying on top of the CPU, blowing down
https://ncc.noctua.at/motherboards/model/ASRock-B660M-Pro-RS-5533
Personally I prefer the https://noctua.at/en/nh-l9x65, which according to Noctua is more than capable cooling this CPU, they also are the most silent on the market, and have up to 6 years warranty, as far as I know

Please help me

I would contact ASRock tech support.
There was someone else with a pwm fan problem with an Intel CPU and ASRock.

please help me