“is there a good reason that the zero isn't dotted in this font?” Because it isn’t a coding/monospaced font? Most text/display typefaces don’t have dotted or

“is there a good reason that the zero isn't dotted in this font?” Because it isn’t a coding/monospaced font? Most text/display typefaces don’t have dotted or slashed zeros. The expectation is that if you have ID numbers etc where you’d need them, you would use a different typeface. The US Web Design System 2.0 (of which Public Sans is a part) specifies Roboto Mono (which does have a slashed zero) for such purposes. See https://v2.designsystem.digital.gov/components/typography/ https://v2.designsystem.digital.gov/components/typography/