Sorry, I'm not following.
You want to see a list of all channels that are potentially duplicates? The logic is pretty simple - it just first looks for EXACT name matches, then does a FUZZY match next. I think you are asking which channels are thought to be DUPL for a specific channel, right? If so, I don't know how I could pull that off in a clean user experience. Short of just sorting by DUPL then looking at the channels around that name.
ie:


