The room temperature super conductor has been replicated ostensibly. Both in a simulation of the crystal structure and in the lab

https://www.tomshardware.com/news/superconductor-breakthrough-replicated-twice

None of this has been peer reviewed to my knowledge but this is getting tantalizingly close

The Chinese paper also "doped" the lead with gold and similar results happened, indicating that we can probably make all kinds of different materials with similar properties