NOTE 10 PLUS BATTERY DRAINS FAST

try to restart it . do you have any pubg or fortnite game installed on the phone ?

There are some tricks to decrease wasting battery.
Some of them are
. Decreasing brightness
. Changing background to images that has black areas.
. Turning off always on display
. Turning of bixby
. Adding most of apps to sleeping apps. In device management, battery, setting
. Turning off auto sync
. Uninstall apps thant send ads alot, or apps like vpn