Stop Software Update Notifications Android. In order to disable the system update notification go to Settings Apps All Google Play Services and then uncheck the Show notifications box. Tap See all apps on Android Oreo and above.
Tap the icon to enable or disable the notifications. The top entry here likely shows that notifications are On for all appsthats the default. Tap See all apps on Android Oreo and above.
To block Android updates Id recommend exploring three options.
To silence your incoming notifications open your notification panel. Scroll down and toggle off Auto update system. Now tap on three horizontal lines in the upper-left corner to open the menu. After that just Google how to get rid of the constant notification up top I cant remember how I did it.