good to know, i researched about help scout and i think it has a complete different use case, (i am not sure what is your industry and what you do, dont want to make an assumption) but i would say that it works for replying fast for a support inbox. it doesnot integrate to the famous support platforms. The original problem is about finding duplicate issues that are scattered in other platforms, like github, forum or a discord. how you resolve them. otherwise you would have to manually find out the resolution for your self.

It's a fair point, I suppose my thought when I wrote the suggestion was "You are unlikely to fix this without a lot of time and tech effort, so you should be pushing those who would create tickets directly to where they should be doing it." Perhaps create a bot that scans the various channels you mentioned, enable it with context from your ticketing system of choice, and then have it respond to submitters as it consolidates issue tracking automatically?

Strongly recommend spending ~1 hr exploring HelpScout's multi channel support via their "Inbox" product, no guarantees it solves your problem perfectly, but might save you a bunch of time and get you 80% of the way to your target outcome. Good luck!

https://www.helpscout.com/blog/multichannel-support/

https://www.helpscout.com/inbox/