But that's just it, it hasn't been debunked at all. It couldn't be. Because China has been almost completely uncooperative in helping to figure out the origins.
The WHO demanded further investigation into the theory just a couple of weeks ago (https://www.nbcnews.com/news/world/covid-19-urges-investigation-chinese-wuhan-lab-leak-theory-rcna32910).
The idea that the question is settled somehow is completely false.