Proofreading help for two issues

[chicagopiano]

I am proofreading scores and would like some help to improve my efficiency for a few specific searches.

1. With choral music, a rare issue is an inadvertently deleted single word lyric. Is there a way to set up a "find" function to look for notes on a staff that are without any lyrics attached to them?

2. In staves that have two parts combined on the staff but the notes are not separated into two separate voices, is there a plugin or function that can identify instances where an additional accidental needs to be inserted? For example, in a staff where altos and sopranos are combined and the upper soprano note has a flat at the beginning of the bar and then later in the bar the lower alto part has that same note, Sibelius won't add the accidental again (as if it were a piano part). But in choral music, the altos reading that lower voice need the additional accidental because they are only following that lower line. Is there a plugin to identify these scenarios?

Thanks for the help!