Battery drainage

Try optimizing your once a while if your screen is running on 120Hz change it to 60Hz also update your Samsung to the latest version

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battery consumption will increase when you use certain features or apps , such as GPS,games, or the internet

On the Settings screen, tap Battery and device care → Optimize now.

The quick optimization feature improves device performance through the following actions.

• Closing apps running in the background.
• Managing abnormal battery usage.
• Scanning for crashed apps and malware.

Check the remaining battery power and time to use the device. For devices with low battery

levels, conserve battery power by activating power saving features.

On the Settings screen, tap Battery and device care → Battery.

• Power saving mode: Activate power saving mode to extend the battery’s usage time
• Background usage limits: Limit battery usage for apps that you do not use often

On the Settings screen, tap Display-Screen resolution: Change the screen resolution. Higher resolutions make the display

more vivid, however they will consume more battery power.

also from the device settings-display-Motion smoothness-Standard: Use a standard refresh rate in normal situations to conserve battery power

also you reschedule syncing by using bixby routine if your device support bixby routine 

Perform Interactive checks through the Samsung Members

app (Samsung Members> Get Help> Interactive checks->Battery).