No. But you said "searchable", and it has a search bar, and it works pretty well. Actually better, because the filters ("from:user", "in:channel-name", "has:image", etc.) sometimes work better than google's filters (Discord's are simply logic-based, no AI to screw things up).
The point is not the built-in search function of Discord, it is to have content such as the work hacker fab is doing globally searchable.
By searchable, I mean universally accesible, be it via trad. search engines or LLMs.
Instead, any knowledge accrued by that community in that particular forum is locked in a box for anyone not participating in that forum, which is likely 5 nines of humanity if not 6.