Depending on how long you've owned the phone it's battery will be new and will reach it's optimum output after a few discharges and re charges of the battery.
Also take into consideration that your using it more than usual to set it up and play with the functions to learn your way around it.
Also your phone's battery may still be in it's learning phase i.e learning your usage.
It typically takes around a week for this learning stage.
You can check in Device Care under battery what is using your battery which then means you can potentially adjust an app or remove it etc and or clear it's cache in settings, Apps, choose the app, storage, clear cache.
You can clear the entire phones system cache files which wont delete any of your personal data.
See > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to hook up to a Computer or insert your earphones to enter into recovery mode.
There are lots of battery saving tips and guides if you would like to perform a forum search , Google Search and have a look on YouTube.
Here are some.....
To add I buy a phone to use it's features and functions so try to not to turn off as much as I can or what's the point of owning a phone can perform these tasks etc !
I also turn off the battery % indicator in the phone's status bar so I'm not always drawn to watching it and worrying.
I also carry round a light power bank just incase I need a boost for my Fold ³ however I've only used it a small number of times.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.