Read somewhere else that the cyber attack on Iran was in retaliation to a Iranian cyber attack on Israel’s water supply that if successful would have raised the chlorine level in the water to unsafe levels.
The problem with cyber attacks on facilities that are almost entirely off-grid when it comes to internet connections is that it can take a long time for the virus to migrate to a critical system. IOW’s if you’re hoping for an effect-on-target in a particular time frame, you could be disappointed.