I think it may be a memory or capacity bug in nova. I've downloaded and installed several apps from amazon and the shortcut always appears on the home screen in nova. But the last 2 apps I installed have not. And, what is worse, the apps do not even appear in Nova's list of apps so I can't find them to manually create a shortcut!
I have nova prime and in it's settings, add a shortcut is already selected. See image.
I have a lot of apps installed on my nexus so maybe nova can only handle so many?
Previously nova got confused with shortcuts to the screen and then straightened out after an update. At that time, both Apex and adw did not have the same problem. Only nova.
This time, I rebooted but things remained the same. Then when I switched to adw launcher I was able to find the apps and create shortcuts fine on adw. Then, when I returned to Nova, problem persisted. I emailed the authors several times with no response. Can't find a forum for nova. I'm ready to give up on nova. It is definitely a bug and only happens in nova.