I get around 8-10 hours sot,but it all depends what you are doing on your phone really.
There are some things you can change to improve battery:
1)dark mode
2) partition cache wipe after each update.
3)change from 5g to 4g network
4)turn off nearby scanning
5)turn off printer scanning
6)put apps you don't use alot in deep sleep
There are other things but I can't remember them 😅.
But like I said I get 8-10 hours sot and that's with wqhd and 120hz on.