List to library links should work in sharepoint mobile app
In browser we can navigate from list record to its related file library. In mobile app its not yet available. Please add this feature.
Grzegorz Szypa commented
I agree with this. For example if I have sharepoint site (blog type) and inside I have few photo and doc library, access from web browser is easy, but doing it on mobile app screen is very difficult. So I agree that it is necessary additional list like dropdown list to each site where we can select and view each content site