Debunked in the sense that the bloomberg article is a work of fiction. The authors wrote a "fascinating" story that has nothing to do with the real world. They assume backdoored resistors and other nonsense to make it impossible to verify their story akin to Russel's teapot.
Reality is boring. There have been supply chain attacks that installed malicious firmware or replaced pin compatible chips. That's not surprising, that's boring and old news.