% Parentheses may be scaled incorrectly. They become too big 
% when the staff is magnified, and too small for smaller
% staff sizes. TrillPitchParentheses do not appear to be affected.

\version "2.23.6"

music = {
  \override Staff.Parentheses.font-size = #5
  \override Staff.TrillPitchParentheses.font-size = #5
  s2 \parenthesize c4 s4 |
  s2 \pitchedTrill c4 \startTrillSpan c s4 \stopTrillSpan
}

<<
  \new Staff \with {
    fontSize = #-5
    \override StaffSymbol.staff-space = #(magstep -5)
  } \relative c'' {
    \music
  }
  
  \new Staff {
    \relative c'' {
      \music
    }
  }
  
  \new Staff \with {
    fontSize = #5
    \override StaffSymbol.staff-space = #(magstep 5)
  } \relative c'' {
    \music
  }
>>