[Geoff Bacon]

You could create a duplicate song without the lyric pages (Edit, Files, Change page order to remove unwanted page) - okay you have two songs but you can use collections to "hide" the song with lyrics

You could put a link at the start of the lyrics that jumps to the next non-lyric page.
This requires editing the file (but you are going to have to do that anyway to show which bits are hidden.)
NOTE: You put the links in each song - not in the setlist as mentioned in your post. Doing tjhis means it doesn't matter in which order the songs are played.

Lyrics might not be a full page

A hide option could be quite difficult to program especially if you are sharing the file with other members (they might want to hide different sections)
It could also lead to more support for Mike when people can't see pages because they are hidden.

A fold option could possible work as this would show where the fold is (but still requires modifying the file)

As you might want to share files, I suggest you use a single file and put links in it - just one tap to skip the section you don't want and the file is still useable by the other members (a single file means that different versions of the file are eliminated).

Hope this helps

Geoff