Could have been a part of the incidence investigation to rule out that the crash was caused by the wake turbulence of the fighter jets going supersonic.
That may well be the reason they were noted in the first place, but the article makes no further mention of them if they were relevant, so it’s still an editorial choice whether to include that detail. There is no informational value to it, it doesn’t affect the rest of the article, just a minor note “fast plane make boom” because it’s cool.
Sonic booms are cool
Could have been a part of the incidence investigation to rule out that the crash was caused by the wake turbulence of the fighter jets going supersonic.