Already reported via Feedback App.
In the Screen Settings Menu, the option is missing to NOT put an App Icon on the desktop after installing it from the App Store.
Please include this option since it is annoying that every installed app will be also put on a new screen.
I have answered already on a parallel Thread since we posted the same topic in parallel.
In Android Oreo 8.0, by default, it is enable to add icons to home screen.
If you want to disable add icon to home screen, you need to do the following:
Tap & hold blank screen on home screen > Settings > Disable add icon to home screen
BUT, unfortunately, this option is not available on Nokia 8 and thus must be a bug.
It is independent from your Mobile provider. Google has moved this setting!