Iran fires a wave of drones first and then time the rockets to land simultaneously.

Iran has multiple missiles, cheaper ballistic ones which follow an arc trajectory, and hyper-sonic ones which are more actively guided

The hypersonic missiles seem to get through frequently.

The ballistic missiles and drones mostly get intercepted, however the goal of those is to deplete interception missile stocks. It is rumored Israel will run out of those in around 12 days.