CSS now has the ability to override some font metrics, so you shouldn't need to edit the font files directly.
And these overrides can be applied to local fonts as well (generally used to ensure the metrics of the local fallback font matches the yet-to-be-downloaded web font, preventing a layout shift when the web font is swapped in)
And these overrides can be applied to local fonts as well (generally used to ensure the metrics of the local fallback font matches the yet-to-be-downloaded web font, preventing a layout shift when the web font is swapped in)
ascent-override - https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/...
descent-override - https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/...
line-gap-override - https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/...
size-adjust - https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/...