Just to build onto @radion’s answer:
Chrome flags are a way to activate browser features that are not available by default. Usually these options are for developers or people that want further extensibility within Chrome, so it can be hard to find. Simply type in chrome://flags in the URL page and then search “Dark” and, as of Chrome version 113, it should bring up the options related to dark mode:
- Darken websites checkbox in themes setting (Android only)
- Auto Dark Mode for Web Contents
