Collect similar content in this forum for searching

Topics focusing on what is similar are sometimes posted repeatedly and are unable to be merged, like those issues created on GitHub, so such ones should be collected to be replied to together, like those issues created on Feedback Hub by Microsoft.
Users may visit this forum to report a problem or look for an interesting topic to join in the discussion, but they are not sure if such topics have been created, so they need a search box that provides related topics in this forum.