Buried in what way? Googling “npr lab leak hypothesis” yields dozens of stories published on NPR sites reporting on that theory, primarily quoting WHO and US government reports. I wouldn’t call that burying. You might not like what their sources say and may think there are sources they ignored, but calling that burying without pointing out those omissions doesn’t seem reasonable.
Every story that shows in search results is something that dismisses the Lab Leak theory as being farcical and pushed by a Right-Wing Anti-China agenda.
Yet... it was and still is the single most plausible theory - and today there's a lot of evidence to indicate it is more likely true than not.
So yes, NPR did suppress the lab leak hypothesis, very successfully. There are many today that still hold it to be some sort of racist conjecture.
As the parent mentioned - there's many other examples if we review the past few years major stories, including the Hunter Biden Laptop fiasco that, according to NPR and others seeking to suppress the story, was "certified Russian disinformation", etc.
While I agree NPR was too quick to reject and smear the lab-leak hypothesis, it doesn't help your case to include the Hunter Biden Laptop hysteria that was fabricated whole-cloth and never had an ounce of substance to it.
> the Hunter Biden Laptop hysteria that was fabricated whole-cloth and never had an ounce of substance to it.
None of what you have said is even close to any resemblance of any sort of truth. I hope you will dig past the partisan reporting to educate yourself further on this particular political cover up.
[edit: add a question mark]