What are best practices in aggregating questions asked after reading a help article via automation?

Is there a way to create a conversation topic to collect conversations that came from our help articles? Or, is there a way using another automation to update a conversation data field which then could be added to conversation topic?

I just built a Current Page URL -> Conversation Tag automation, but it doesn't tag past conversations, so I'd like to figure out how to use the conversation topics to aggregate these if it's possible.  

I built a conversation topic that searches for the message "sorry that didn't have the answer you needed If you'd like, you can ask the team for help" since that's what the bot sends, but it only picks up that phrase in rare instances when someone replies via email to this message, as then the bot message is contained within their message... (I guess the bot is not a teammate so it doesn't pick this up when it's presented in the chat from the Sad Face at the bottom of each article).

The problem I'm trying to solve is to identify questions asked after reading a help article. The team I work with is new to the practice of manually adding tags to conversations, so I prefer to build in tag automations.

Perhaps there's a clever way to aggregate those already-asked Help Center-inspired questions I'm not thinking of?

Thanks!