Early on, there was a real disagreement between specialists on the origin on Covid, with some supporting natural origins and some supporting a lab leak. But that debate is now essentially over. With more data carefully examined, the evidence best supports natural origins.
The virus was initially repeatedly found in a specific animal market, and even a specific stall that appeared to be the source. For a lab leak to be the source, the person or people who leaked the virus would have to have repeatedly visited that market every time they leaked it and nowhere else so that it looked like that market was the source.