I think in your idea, the exploit is real and known by LE and Bloomberg. However, Apple was not able to find this out, even though it was real. Is that the case

I think in your idea, the exploit is real and known by LE and Bloomberg. However, Apple was not able to find this out, even though it was real. Is that the case? If so, it would suggest the FBI is allowing Apple to unknowingly use compromised systems?