Instagram Dark Mode just hit iOS and Android. I've got an iPhone 11 Pro running iOS 13 and the latest version of Instagram (v114) - to enable dark mode, just turn on dark mode on your phone and Instagram will adjust accordingly. On Android, opt into the developer version of Instagram, and if you're on Android 10 with dark mode, it will work automatically.
My IG: / samsheffer
Old workaround: • Instagram Dark Mode