I've had my phone 4 days now. Battery is ok but expected better. All my apps are sleeping but still battery drains while using. Could be since the latest update but I installed it day 1 when I get my phone. Take a look at screen shot. Full chargerd to 100% take it off charger and 57min later already down 2% !!!
Remember the phone is still learning your behaviour & also optimising. I usually give new phones about a week or two before I start worrying. Because you only get 14 days to return it if need be (due to any faults) give it about 7 - 10 days to settle down.
mine drains relatively decent but my s10 plus when i got it was doing same first week i was shocked how quick was draining but after a week and even now i can play watch movies listen music or whatever and it keeps me 7 8 h and if i only listen music no videos then it keeps me 20h
probably needs more time. it's stil saying learning usage under battery. I still think the latest update had something to do with the battery and heating problems people are having... reviews on YouTube seem to mention great battery life but they where on a different software version.