We can't absolutely rule out the lab leak theory, but a growing body of evidence suggests that the origin was natural, and it spread out from the wet market.
The latest credible document I've found about it comes from someone who was one of the signatories to the request earlier this year that an investigation into its origin be carried out, including the possibility of a lab leak. This does suggest he is quite impartial in the matter.
Obviously the tendency of China to want to hide everything lends weight to conspiracy theories, but China is like this in everything, not specifically the Covid virus.