Do you have a source for that? Windows had dark mode in 2016, macOS in 2018 and iOS/Android in 2019.
Apple proposed the standard: https://github.com/w3c/csswg-drafts/issues/3299
Safari 12.1 was the first browser to ship with color-scheme and prefers-color-scheme support: https://developer.mozilla.org/en-US/docs/Web/CSS/@media/pref... https://developer.mozilla.org/en-US/docs/Web/HTML/Element/me...