My app is updated but there's no karaoke mode when I scroll down. I already tried logging in and out but it doesn't show up. My friends have karaoke mode on theirs, so I know it's not a problem with Spotify itself.
Hey Welcome to Spotify Community and thanks for reaching out here! Spotify is often testing and launching improvements and new features and this 'karaoke mode' is an example of an experimental feature Spotify is testing. Some experiments don't cover all users and all markets around the world, so this means sometimes a user can get a feature temporarily or see a change first than other ones, for example.
But, don't worry! When all tests are finished and the feature/change is released publicly, you'll get the chance to put your hands on it. Just make sure to keep your app updated to don't lose anything 🙂
To get more information about it, take a look at this article: