SOT is a poor way to measure battery.
Totally dependent on how you use the phone.
I get sometimes about 3 hrs SOT, but the phone doesn't need charging for nearly two days
Other times I get 9.5 hrs and it needs charging before the end of one day.
Apps such as Facebook will happily munch away at your battery life without even using it.
Streaming and background processing by certain apps will also have an effect on battery life.
If a phone lasts a full day, then I'm happy.
I use full screen resolution and I don't use any battery saving measures. So I don't expect any more than a full day.
As
@Pugs1957 alludes to, check the apps for what is consuming it most and check your usage.
Clearing the Partition Cache on the phone can help as well