Someone should sue FACT for copyright infringement – and refuse to settle.
In US law, there is no such thing. The shape of a glyph (or many) isn't even slightly copyrightable. This is settled law. Fonts (on computers) have a special status that makes them semi-copyrightable in that some jackass judge from the 1980s called them "computer programs" and so they have the same protection as software... but this won't protect against knockoffs.
A font file is more like a config that’s used by your OS to render something, there’s no real interactivity in fonts (except some ligatures but those are just static tables, right?).
Fonts aren't software in any meaningful sense of the word.