SNPtheCat said:
Font size for >=1 works, fractional doesn't
Font size has no effect

transform:scale(2) doesn't have any effect besides resizing the icons, or none at all. But then i haven't tried very hard with it

If there is a way to duplicate an element and interact with it (we can already scale svg), it would be nice

There's feOffset, but it seems inextricably linked with feBlend and is complicated