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.
This person isn't just collecting existing letter shapes; inventing a new letter shapes would be protected by copyright?
There are lots of things that can't be copyrighted.
For example you can't copyright an anatomy drawing: https://www.skeletaldrawing.com/licensing (i.e. the layout of the bones, etc) but you can copyright your specific drawing - but someone else could draw in the same style and not violate your copyright.
Same here: You can't copyright the shape of the letters, but you can copyright you specific ttf program (expression), but someone else can make the same letter shapes if they want.
There are many ways to draw the same letter, as there are many ways to draw a cat.
Also if one draws letters that look like cats, will they fall under copyright protection?