I had used Mi A3 which has 4000 mAh, which merely gave 5 hours of SoT. Even in that case My M51 gave me 12+ hours of SoT. mostly gaming, surfing and youtube. I use indoors mostly. if you use your phone in outdoor, battery will drain faster comapre to indoor usage automatically because of high brightness level. but still you can do some steps to get best battery backup.
settings > device care > Battery > select Power mode as optimised or medium saving as your wish and enable adaptive power saving. then go to app management and enable adaptive battery and put unused apps to sleep.