Scale fonts types (serif/sans/typewriter) globally

Hi Lilypond users,

in below example, I have replaced the text fonts.
Now other fonts typically have a different size than the default Emmenthaler
font. In below example, to match the default fonts size, I'd like to scale the
serif and sans font by a factor of, say, x1.23. Only those two types. Not any
global scaling like "set-global-staff-size" which would scale everything else as
well...

Any idea how this could be achieved?

\paper {
  property-defaults.fonts.serif = "Libertinus Serif"
  property-defaults.fonts.sans  = "Libertinus Sans"
  % property-defaults.fonts.typewriter = "Hack"
}

Thx