I just fired up 4.0 on iOS 12.3 and I when I go to Repertoire/Songs there's no longer a document icon--tapping the song entry brings up the edit screen. Is this a deliberate choice?
Yes, the buttons in the Repertoire > Songs list have been moved to the song edit pages. This allows you to more easily preview those functions while editing a song, and makes more room in the list for the title and other text.
To view a song's info in a performance or rehearsal situation, it's better to use a set list or smart list, where the buttons are bigger and customizable.
So they have. Thanks.