The fact that this is news means that Iran will be prepared for Israel (unlike what happened in Iraq almost 30 years ago under Saddam Hussein).
I don’t know if Iran has taken delivery of any of the new AAW missile systems it was going to buy from Russia. In any event unskilled operators are going to have a hard time with expert air attack with heavy ECM. I’d bet on the Israelis.
Iran won’t know what hit them.
The Iraqi’s were already prepared for a strike on their reactor. There wasn’t a lot they could do about it anyway. The Iranian Air Force were the first to bomb the reactor building during the Iran-Iraq war. The building under construction was damaged during that raid.
How are they going to prepare? They didn’t get missiles
from Russia: they have conventional ground to air missiles
and fighter jets. Their economy is in the tank, they have to export crude to get it refined.