I don't consider a replication attempt with a lab in a commercial relationship with another lab, that has essentially embargoed the results for six months, credible.
Of course, but you don't waste your lab time with useless samples. KENTECH must have seen something to actually allocate resources for the analysis. The recent interview with the vice president of KENTECH said that the initial request was in 2017, when samples were not really reproducible and too impure for analysis, but it was only this year when samples are good enough and can be actually analyzed---if it's just a fake they could have done so in 2017 instead.