If Power Saving is enabled, my phone stays at 60hz refresh rate. But if I want to save more power and drop to 24hz or 1hz, I have to disable Power Save just to turn on Adaptive Refresh Rate, then it can fall lower than 60hz.... I just want to save power and have it dip to 24hz/10hz/1hz.
With Power Save enabled. I'm locked at 60hz for static content With Power Save OFF, It will dip to 24hz immediately, and maybe 1hz after a minute or so
If you really care about it get XDA's Galaxy Max Hz which let's you set the refresh rate to whatever you want. In my experience though what really kills the battery is mostly the SoC and the refresh rate/screen brightness barely makes any impact on my SoT with the way I use my device though.