I don't understand why people are attaching any weight to Alexandra's claims. AFAIK, it's a pseudonymous account that has provided no evidence that couldn't be easily faked. You might object that the evidence provided by the non-pseudonymous scientists could also be faked, but the key distinction is that they're attaching real, professional identities to their claims. There are reputational consequences to making things up. They have skin in the game. A pseudonymous account doesn't. Why should we believe them?
Not quite pseudonymous - she says her name is Iris Alexandria and that she's affiliated with the IGB in Russia and is now collaborating with the MEPI in producing more and measuring samples and that this is the reason why she doesn't publish any data as it's not hers and is bound for a publication, and that some of the researchers there are familiar with alternative superconducting theories which LK99's late PI was basing off on.
Of course it could all be faked, but she is prima facie attaching real, professional identities to her claims.
