Everybody's talking about reproducing the material which is great, but will take time. Why don't the authors supply their existing material to an independent lab for earlier confirmation?
It'll be superconducting tomorrow if it's really superconducting today.
I'm 200% not a physicist, but it is possible that during transit, minor bumps / temperature changes / ionizing radiation / oscillating E-M fields could screw up the material in a way that matters?
"Condensed Matter Theory Center (a Twitter account affiliated with University of Maryland) says they will send samples." - sanxiyn 2 days ago https://twitter.com/condensed_the/status/1684960318718406656
If it's actually superconducting we've got a wide variety of ways to inspect what LK99 actually is that will shed a whole lot of light on how to create more of it, or more of a similar superconductor. It'll be one of the most important scientific achievements in our lifetimes regardless of whether or not it can be replicated with the process in the paper.