What the source actually said, according to that article:

When asked what, exactly, he found strange about Bloomberg's claims, Fitzpatrick said, "It was surprising to me that in a scenario where I would describe these things and then he would go and confirm these and 100% of what I described was confirmed by sources."

You could take that to mean "Bloomberg took a scary hypothetical and pretended it was real," but if they did have other sources telling them "There are these backdoor chips in servers" this is exactly what you'd expect Bloomberg to do: go to a security expert and ask "Hey, does this really work?"

It doesn't particularly read like evidence one way or another to me.