The 2 "replications" as of now are just of some somewhat clear "floating" but no clear confirmation of the meissner effect or flux pinning taking place (superconductor specific mumbo jumbo) , or conductivity measurements. To be clear it is positive but not proof of superconductivity, its consistent still with a few other very niche magnetic property combinations. Maybe it is some weird super diamagnetic material but that kind of stuff isnt really well understood or modeled either. But it seems like it wont take too long till we know what is happening actualy. Like in a weak

seems like the korean team that has been working on it for years naturaly had a better sample and more trial and error and prob a lot of the unclear behavior in these first few tries is because naturaly the quality of the samples or the structure is all over the place. Most attempts failed either way. For a non standardized process some teams may gotten luckier and got a semi working flake of the material. From the paper the lattice position that the Cu atoms need to replace the Pb ones for the structure to deform/symmetry to break in the right way for the assumed properties to arise is the less favorable energy wise of the 2 the Pb occupies. So its likely that in the "successfull" replications portions of the flakes got the correct structure so you end up with some localizd superconducting ereas and other ereas of other magnetic behavior. Thats an optimistic scenario where the thing is indeed a room temp superconductor