search for sideload android 10 s10 plus on google. but beware as its for some firmwares not all.

if you have a problem you can post it here we could be able to help

sorry uninstall it

how you checked that all programs are closed because just from the recent apps button does not mean that all programs are closed, some apps runs in the background without being showed in the recent apps. you need to go to settings > apps > apps permi...

if you want to close the WhatsApp . you will find fingerprint lock inside privacy