What was the time between hits in this case?
A double-tap strike is often legal basis for war crimes already as the primary purpose is to hit first responders and avoid any survivors being saved.
Or are they launching two for redundancy, like often happens in military situations? Planes and missiles can break down or get shot down. If you want the target destroyed, you send more than one.
It is different when they wait longer, which you mentioned was happening in Gaza. IDF waited for paramedics to arrive before striking again.
That is not automatically the case whenever two missiles strike a target.
The "follow up" hit requires a delay. The delay is not accidental - you want to give time for a crowd to gather.
All targets in the area received >= 1 missile, and all somewhat close together, from the NYT analysis.
All of these facts are outlined in US' own internal investigation and in the UN's fact-finding mission.