Has anyone seen any evidence to suggest COVID 19 didn't come from a lab?

Yes. There was a program that was Defunded in September 2019  called PREDICT. Their job is to track how many viruses in animals had a large potential  to spread to humans (zootonic ) . 
They were tracking 1200+ Such viruses. 160 of those were in coronavirus family of viruses. This is exactly what PREDICT and other pandemic/epidemiological research had predicted as likely for decades.

 Our worst pandemics historically have also come from zootonic viruses jumping to humans (rats and fleas during Bubonic plague), pneumonic plague also likely originated from animals as well, and there is strong evidence to suggest that the 1918 Pandemic was due to a transmission between swine and humans. Then of course There was also more recent SARS-Cov-1  ( found in 1/2 dozen species including pigs) MERS (bats to camel to human) , avian flu (Bird flu) and swine flu (here we go with swine again!) outbreaks, all of which started as Zootonic.  

There is no indication SARS-COV-2 ( The virus that causes The disease COVID-19 ) is Engineered, it would need to be established that it is, and there is no indication of that. Zero. 

Furthermore , an engineered disease, would likely have a higher mortality rate. Bio weapons are scary AF. This would be a drop in the bucket compared to what designer diseases could do. Especially if designed with high mortality, high communicability, and a long  infectious incubation period. It would be Devastating. A drop in the bucket compared to this.

The scientific consensus rejecting the virus being engineered is almost unanimous. In a letter in March, a team in California led by microbiology professor Kristian Andersen said “the genetic data irrefutably shows that [Covid-19] is not derived from any previously used virus backbone” – in other words spliced sections of another known virus. They have mapped the genome of this virus. If it were engineered, we would know. The scientific community would know. Too many people would know for it to be “kept secret” 

 All the current evidence points to a zootonic Viral disease that made the jump from animal to human.  This is expected to occur more frequently as high populations of humans come into closer and closer contact with animals , infringing on their environments , and the abhorrent conditions we keep livestock in , it may as well be a viral and bacterial Petri dish passing zootonic Diseases back-and-forth between themselves, constantly mutating until finally it reaches a mutation that is Sometimes harmful to and able to spread in humans. Look at the conditions we keep pigs and chicken and beef in... Quite frankly , surprised it’s not happening more often! No wonder so many Of these diseases originated in swine. Look at conditions in pig farms in the US, and around the world... 

Right now , we’ve found that Wuhan may not even be the source, it may have been in another area in China as type A . Then mutated again into type B  While they think it originated in bats that gave it to another animal that gave it to humans, it’s not entirely clear. But this virus is very similar to previous viruses found in bat populations and that it likely mutated to be communicable to humans. As it spreads from human to human it will continue to evolve naturally.  (The 1918 pandemic mutated in the trenches of WW1 , a very unique situation where humans were in pretty much the same conditions we keep livestock in and is believed  to be why the 2nd wave was much worse, this is another reason why social distancing is so friggin important) 

Lastly, I have a little bit of a problem with the wording of your question. Am I supposed to prove that unicorns don’t exist either or leprechauns? The burden of proof is on the one making the claim. If someone is claiming that this disease is designed, they need evidence to support that claim. The only good reason to believe anything is evidence. When a conspiracy theory sites it’s a lack of evidence as it’s evidence, and one believesit, that person needs to take a good hard look on how they evaluate evidence. The evidence pretty clearly points to zootonic transmission, then human to human.  

1 A novel bat coronavirus reveals natural insertions at the S1/S21 cleavage site of the Spike protein and a possible recombinant 2 origin of HCoV-19
https://www.biorxiv.org/content/biorxiv/early/2020/03/06/2020.03.02.974139.full.pdf

Wuhan-like virus discovered seven years ago
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7130548/

The epidemic of 2019-novel-coronavirus (2019-nCoV) pneumonia and insights for emerging infectious diseases in the future
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7079563/

An analysis of the genome published in Science showed conclusively that the virus is of natural origin. This is a horseshit conspiracy theory; nothing more.

There is zero evidence that it came from a lab, even though Mike Pompei-hole says there is "significant evidence." He said he cannot tell us. The reason is clear. He cannot reveal what does not exist. Trump says he is not allowed to tell us what the evidence is. That is a lie, because the president can declassify anything he wants. No one can stop him. Trumptards try to argue that the information cannot be revealed because it is classified. That is complete BS of course. The SARS virus did not come from a lab.

No, but I also have no evidence that it DID come from a lab...Slow down, you move too fast...

There have been several studies that say it was not man made or altered genetically. As to the question of the actual source in this case, the jury is still out due to a lack of information from the Chinese. In time I believe the US and other free world intelligence services will find out the answer.