Your phone's battery is new so won't typically reach it's optimum output until it has been discharged and re charged a few time's.
Also your battery may still be in it's learning phase @gulali
Check in Settings, Device Care and Battery.
Daily Driver > Samsung Galaxy s²⁴ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
