Hello. My laptop has a non-variable 120 hz display. I sometimes use my laptop at school, but we know intel laptops’ battery life sucks. So I always use my laptop on ‘power-saver’ profile to extend battery life while not plugged in. I believe refresh rate is a major contributor to power consumption. So I manually reduce to 60 hz if I left my power adapter back. When I get home, I play games like minecraft and I desire 120 hz, so I plug in the power and increase the refresh rate back to 120 hz.
I think this should be like android. When you enable power saving on android, it reduces the refresh rate to 60 hz.