Pompeo's effort to prove lab theory shut down by Biden over quality of evidence

What’s ironic is that on lite.cnn.com the next story is “New US intelligence has fueled calls for more studies to determine the origin of Covid-19 -- and to guard against future pandemics”

https://lite.cnn.com/en/article/h_53918021dfe913048a71b6a917...

How do you prove either way without a thorough investigation of the lab by relatively trustworthy parties?