No it isn’t. And that isn’t that many. I got 3,5 million a year, if your hits means search hits from Google. If it means user visits, it isn’t that much either. If it means bot visits, it is even low. Plus hits doensn’t mean any of AI would tell your forum is defenetly used as a cited source. It depends what type content you have there.
But yet, it isn’t such thing what you can ask here. Only Ahrefs knows how they are counting theirs metric.
Plus Ahrefs doesn’t see via Google how many times an AI has cited