Fact? It's frankly discrediting to refer to the lab-leak hypothesis as such because GOF is definitely a huge risk vector that we should address even without high-confidence conclusions like "fact" regarding COVID's origin (which we don't currently and probably never will have anyway).
GOF is dangerous and should be stopped regardless of its causal relationship to COVID in particular.
I.e. if we were ever to find certain evidence COVID was not caused by GOF research, it would still be a very good idea to ban GOF research.