For all those who haven't figured this out yet (which I assume to be quite a few people) if you want to be able to quickly find your past threads, just be sure to tag your username when creating it so you can searchbar it later.
Have a nice evening.
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Or, in the mobile app, go to the Forums area, and swipe to the right. [spoiler]view the favorites[/spoiler]
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You can also click on the "favorites" tab within each forum (or use "All Forums") and it will show you all the threads you've created even without tagging them with your username.