@sarasphotobox: Please follow the link below for some tips on how to improve your phone's battery life. Some of the steps are for previous Android versions, but the general tips should be of some use to you.
Hello @sarasphotobox
If your phone is relatively new then it will take a few days to Optimise.
In regards to Battery Saving Tips here are the one's I use on my phone's.
- Turn off Auto Brightness and set it to half way.
- Use a Dark Wallpaper.
- Screen Timeout to 2 minutes.
- I turn Off 5G in Settings and Connections as my tariff does not yet incorporate 5G and 5G is known to use quite a bit of battery.
- Dark Mode.
I'm not in favour of turning Off features on my phone's that make it more useful to save a bit of battery.
I leave Location Services On.
I let my phone Sync.
On my phone it's on 120hz adaptive refresh rate and FHD+ resolution.
My advice is after a full cycle of use check your battery stats in your phone's settings to see what's using any excessive battery.
Apps can be set to sleep or deep sleep mode if required.
Performing a forum search will also yield more battery saving tips that people have shared and discussed. 
My top battery saving tip is to turn Off the Battery % sign in the status bar so your eyes are not drawn to it and just enjoy the phone for what it brings. 
