TLDR:
As noted by Marc Garlasco, a Military Advisor at PAX for Peace’s Protection of Civilians team, the impact point does not appear to be consistent with the 500, 1000 or 2000-pound bombs used in Joint Direct Attack Munitions (JDAMs).
With accompanying bellingcat analysis + a panorama they created with available video of the blast site.
My theory, it was another “knock” by Israel to get the hospital to evacuate. But it hit the cars in the parking lot which exploded. Israel knew this would be seen as a bombing, so they blamed Hamas. And then both “teams” lied their fannies off.