Can you go into Settings, Device Care and Battery and screenshot there to show battery usage and the apps using your battery. You may have to use the scroll down function to capture them all and add that to your thread here.
The Samsung Members app has a diagnostic tool and a further diagnostic option is available via dialing the following into your phone app *#0*#
Sometimes Safe Mode which stops downloaded apps from working but leaves the stock apps working helps to show if a downloaded app is misbehaving.
As your commuting it may also be that due to masts and signal connection the phone may have to be working harder to maintain said connection.
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.
I have used both diagnostics tools like you said. The �*# had nothing to do with the battery and Samsung Members said the battery life is good and the capacity is 2550 mAh.
Here's the screenshot of the battery usage in the device maintenance settings menu you requested.
By the way, I already said in my first post that I have closed all the apps running in the background with Battery Saver
I will try making the same journey while my phone is in safe mode later on.