\version "2.21.0"

displayedMusic = {R1}

lyricsMusic = {r16 c''}

verse = \lyricmode {Lyrics}
% Somehow ^this line breaks Frescobaldi indentation.

\new Staff <<
  \new Voice \displayedMusic
  %\new Voice \lyricsMusic
  \new NullVoice = "nullVoice" \lyricsMusic
  \new Lyrics \lyricsto "nullVoice" \verse
>>