It doesn’t, but there is nothing to be said until we get some actual, further evidence. Right now, all we really know is that Magnus felt confident enough to take a rather dramatic and public step. At the same time, an awkward interview where you fumble some analysis can just be written off as stress from being accused of cheating by those inclined to believe Niemann.
That is sort of the problem: at this point, everyone can read into everything what they want to find.
Had he beaten Alireza, some would have said that was further evidence that he was cheating. If Alireza had beaten him, folks would have said that was further evidence he cheated yesterday.