So there are, potentially-speaking, explosive devices controlled by Israel planted in consumer-devices, in every single country on the globe.
I don't think the point is that it's not difficult to screen for, the point is that most people will not think to or do not have the means, the time, the knowledge, or the willpower to take apart all their devices, verify what is and isn't an explosive device, and then reassemble it intact. According to this report, there are a non-zero number of devices around the world, possibly in shipping containers, that contain explosives.
At least one of the suppositions I saw this last year, was that Ukraine was likely to be slapped on the hands for using consumer shipping for their military drone deployments. Because presumably, the majority of countries will not take lightly the fact that any given consumer shipping could now contain military equipment that could potentially be deployed against them, and that it is in the interest of every single country to react with prejudice to the mixing of consumer and military shipments.
An agent of the Israeli state has now admitted that since at least 2006 (so the better part of a quarter of a century), they have been planting bombs in consumer-grade electronics and subsequently using them to selectively blow people up in civilian places. How this is not a) worldwide news, and b) taken as an admission of overt terrorist activity, is utterly baffling. Can you imagine the reaction if an ex-NSA, ex-CIA, ex-MI7, or ex-MSS operative admitted that they had been planting explosives in consumer grade electronics?! There would be an international uproar.