the authors haven't given anyone a sample to inspect, so every other solid state physics lab in the world is instead trying to follow the notional recipe and test their own sample.
There are claims that they are going to share, but since it is fragile and they only have a few samples the logistics are tricky. They might not be telling the truth about sharing samples, but I'd wait a couple months before accusing them of lies. In fact if they share too quick I'd suspect it is so they can ship a box of dust and claim shipping damaged the only sample!
Why not? It would help their case immensely, especially if replication is tricky.