We do not know the size of Iran’s attack. We know only what the media says, and why believe them?
The news throughout the Middle East reported Iran's missile attack as it was happening. There is video on social media of Israel's defenses shooting down the drones and missiles. The IDF issued a statement on the types of weapons and their numbers off IDF estimates. Iran admitted the attack. The only reporting of Iranian missiles hitting Israel was at Nevatim, nothing else on social media."Last night Iran launched an attack against Israel and routine more than 300 threats of different types..."
"Very significant out of about 170 unmanned aircraft..."
"Of the more than 30 cruise missiles that Iran has fired..."
"more than 120 ballistic missiles...."
That is enough information to show the attack happened and its reporting is accurate.