I'm very skeptical, we have seen so many claims of room temperature superconductivity that have turned out to be fake... but considering that Berkeley National Laboratory replicated it, this makes me far more hopeful.
LBNL did not replicate, they simulated the material and found it promising. The lattice of the materials need some sort of substitution to happen in an less likely way, someone with knowledge will have to summarize better.
This is how it starts though. Smaller labs do simulations and get promising results which gets the attention of bigger labs with the capacity for actual experimentation.