Since upgrading to 4.2.0, I can no longer edit the lyric font style in the Edit Font Styles dialogue box. (as per this help file Changing the font styles used for lyrics)
Did the edit mechanism get moved?
I am showing harmonic analysis and use MusAnalysis font which lays out the inversions very nicely and cannot simply use the default for this purpose.
Lyrics have been moved to Paragraph Styles. More flexibility!
Here’s the equivalent page from the latest (Dorico 4) manual, which has been reworked somewhat to be a bit more instructive – your link was from the first, Dorico (1) manual. A lot has changed since then, both in the app and in the manual!