This is how you get rid of the message at the bottom of your screen (Note10/Note10+/Note10 5G) when you are charging your device:
1. Download this wallpaper: https://mega.nz/#!FogyWSxS!z6fV8XsrW...jM5sDW08zIGn5I
2. Create a folder on your phone, eg "Screensaver"
3. Place the downloaded image in "Screensaver"
4. Go to: Settings -> Display -> Screensaver -> Select Photo frame -> Select Screensaver
Before -> After