I wouldn't say it's proven one way or the other but you can cite evidence on both sides, like in favour of a zoonotic origin, the previous SARS outbreak and other viruses have been zoonotic, there were cases near the wet market. In favour of lab, it's a bit of a coincidence that a novel form or SARS popped up near the number one lab in the world researching such stuff, and in a way that could be easily explained by research proposed by Ralph Baric, the no 1 researcher of such stuff who proposed such research in collaboration with the Wuhan lab.
My guess is that although a grant application for Baric's research was turned down, the Wuhan lab went ahead and did it anyway and had a screw up.
Evidence doesn't have to mean proven beyond all doubt.