\version "2.22.1"

\score {
  \new StaffGroup <<
    \new Staff \with { instrumentName = "" } <<
      \new Voice {
        \incipit {a}
        a
      }
    >>
    \new Staff \with { instrumentName = "" } <<
      \new Voice {
        \incipit {\key f \major a}
        a
      }
    >>
  >>
  \layout{ 
    indent = 4\cm
    %indent = 4\cm % aligns notes but now clefs are off
  }
}