There's something else a lot stranger going on, though. It is a proper monospace font, but the typesetting on the shirt is not. There's some kerning going on (I noticed it especially in the 'Iy' pair), and also it appears that narrower characters such as 'i' take less horizontal space. If I had to guess, I would say that it was set with a tool such as "optical kerning" in InDesign.
We use monospace fonts for a reason, they stack in a grid nicely. But within the confines of that grid there is room to shift a character left or right a bit which may lead to a nicer to read monospace. (it is equally likely to lead to a hideous mess, every time a letter would shift left it would leave a larger space right)
https://github.com/githubnext/monaspace/blob/main/docs/Textu...
It's the main reason I use monaspace as a font.
And: doesn't this result in text that "jumps around" as you type?
It's a fun subtle adaptation to keep close to the typewriter-like experience of the app.