Custom Resolution Utility (CRU)

[MissTheRage]

hi everyone, i have a few questions i hope i can get answers because i will be very happy if i succeed. My system is notebook but I connect it to the monitor and use it. My main monitor is ASUS VS247 1920x1080 60hz monitor. I use the internal screen of the notebook as the second screen, and it is 144hz. I wanted to watch some youtube videos and increase the hz value of my main monitor, but no matter what I did, it didn't work. For example, I never had the "Automatic LCD Standard" option. I already tried to change the speed from the nvidia resolution change settings, but the result was that the screen went black. Don't worry, I know that the main monitor works with the notebook's external video card, I'm sure of it. can you please help me? can i increase my hz?
System:
i7-9750h
GTX1660Ti