How long is your battery lasting @Gazza40 ?
How long have you owned your phone ?
You can see all the stats in Device Care under Battery. It'll also show what's using the battery too.
There will be settings you can look at to optimise usage etc.
Battery life is a subjective topic as we all use our phone's differently.
The problem with battery stats etc is that one person may get better usage tines than another due to a multitude of reasons.
We all have different usage patterns , apps, phone's preferences settings, apps preferences settings, signal strengths etc.
I personally turn my phone Off at night to charge up too.
A Samsung Experience Store or Samsung Service Centre can run a diagnostic test if you feel it necessary.
🌈 Stay Safe & Stay Alert. 🌈
Current Phone ~
Samsung Note 20 Ultra 5G SM-9820 _256Gb SnapDragon 865+
Samsung One Ui 2.5/ Android 10.
Put all apps in deep sleep except whatsapp and enable adpative battery, disable adaptive power saving and set the power saving to medium, disable always on display.
That is the most you can do from my point of wiew