Yes, usually you can still see your Spotify Wrapped story on the Spotify app. It might be available in your profile or a dedicated section for Spotify Wrapped. Just look around in the app's interface.
Well, it depends. Spotify generally keeps your Wrapped stories available for a while. If you haven't deleted your Spotify account or had any major issues with it, there's a good chance you can still see your 2020 Spotify Wrapped story. Check your app's home page, or the 'Your Library' section. Sometimes they have a special area for all the Wrapped stuff over the years. So, in most cases, yes, you can see it.
According to the current situation of the Dragon Series novels, the Dragon Series novels have ended, so I can't see the end of the Dragon Series in my lifetime. However, the author, Jiang Nan, had revealed that he would continue to create a new Dragon series in the future after the end of the Dragon series. Therefore, it could be expected that Jiang Nan would continue to create a new Dragon story at some point in the future.
It depends on the platform and the specific settings. Some platforms might have loopholes or glitches that could potentially allow restricted people to still see your story. But generally, if you've properly set the restrictions, they shouldn't be able to view it.
As a fan of web novels, I'm not sure if Detective Conan will see the ending in my lifetime. However, according to the author Aoyama Tsuyoshi, the series will continue and he has hinted at the development of some key plots. Therefore, even if we don't know the exact timeline, we can still hope that Aoyama Sensei will continue to create more exciting stories for the readers.