A lot of people are sensitive to bright light and many study at night, dark mode would be a day and night difference to them! Several other learning platforms support this as well. This seriously will be helpful for so many people. We are now resorted to some extensions/force dark mode options and these just can't match with native dark mode and contain several bugs and issues.

Until then to those who need dark mode, these are the ways you can do it:

Common Browsers:

Dark Reader for Chromium browsers

‎Dark Reader for Safari

Dark Reader for Firefox

Android: How to Force-Enable Dark Mode on All Apps in Android 10 Yes, this unfortunately can't be done if your running Android 9 or lower but this may help you Force any Android App to have a Dark Mode - YouTube

iOS: How to Force All Apps to Use Dark Mode in iOS 13