Inlined font without duplicating master?

Is there a smart way of making an inlined version of a given master without duplicating it? The inlines need to be real outlines, no stroke parameter.

Can you post a mockup? Not sure what you mean by inlined.

By inlined I mean “Inline”, a font with (black) contours and a thinner white line inside (not touching the outer lines). Something like this.
Capture d’écran 2023-06-07 à 12.59.33

Where should the inline come from when you don’t draw it in an extra master. Automating it is not possible (yet?)

I was thinking about a layer (or mask) which could be exported or not?